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A Link Between Wormholes and Quantum Entanglement

sciencehabit writes "Theoretical physicists have forged a connection between the concept of entanglement — itself a mysterious quantum mechanical connection between two widely separated particles — and that of a wormhole — a hypothetical connection between black holes that serves as a shortcut through space (first abstract, second abstract). The insight could help physicists reconcile quantum mechanics and Einstein's general theory of relativity, perhaps the grandest goal in theoretical physics."

186 comments

  1. This is correct by techtech · · Score: 0

    This is the direction. Thanks.

  2. Mysterious quantum mechanical connection? by HateBreeder · · Score: 1, Interesting

    I am not a physicist.

    But I keep hearing that there is actually nothing mysterious about entanglement at all... Something along the lines of:

    You post 2 envelopes containing cards in opposite directions, one with a printed letter A, the other card with the letter B.

    At one destination, the envelope is opened to reveal the letter A. ... then through some mysterious quantum mechanical connection.... you know that the envelope at the remote destination contains the letter B.

    And that's about all there is to entanglement....

    Can any physicist confirm?

    --
    Sigs are for the weak.
    1. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 1

      I can confirm that it is weirder than that.

    2. Re:Mysterious quantum mechanical connection? by bigfinger76 · · Score: 1

      I believe Einstein thought that the state was predetermined, much like you described. We've since found that he was wrong. But I ain't no physicist....

    3. Re:Mysterious quantum mechanical connection? by BitterOak · · Score: 5, Informative

      Unfortunately, it's not that simple. In the scenario you're describing, there is hidden information inside the envelopes, as the direction of the cards has already been determined. The quantum mechanical analog is this is so-called "hidden variables", aspects of the state of a system that we simply can't see. But experiments have ruled out this possibility, so quantum mechanics is actually much weirder than that.

      --
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    4. Re:Mysterious quantum mechanical connection? by quax · · Score: 1

      Please moderate this up, it's the correct answer (and yes, I hold a physics degree).

    5. Re:Mysterious quantum mechanical connection? by dltaylor · · Score: 5, Interesting

      That's too simplified (as is this reply).

      It is not that one is A and the other B when posted; rather that they are each an AB, which, when revealed, resolves to an A or B. That resolution then also resolves the other, but, that information must be communicated "faster than light", which is currently not supposed to be possible (if FTL information transfer really worked, all sorts of wierd stuff ensues, incuding the possible destruction of the universe).

      By proposing a sort of "worm hole" which, in effect, creates a single particle string with just the endpoints noticable by us as distinct particles, the entangled endpoint-tunnel-endpoint can transfer information outside the four-dimensional universe' ligh-speed limitation.

    6. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 1

      A more accurate analogy is:

      You post 2 envelopes containing cards in opposite directions, both blank.

      At one destination, the envelope is opened and the letter A printed on it. ... then through some mysterious quantum mechanical connection.... the envelope at the remote destination is opened and contains a card printed with the letter A.

    7. Re:Mysterious quantum mechanical connection? by Culture20 · · Score: 5, Funny

      The observation effects the outcome. So in your example, the envelopes were sent with blank pieces of paper. You use scissors to open one letter, resulting in a nice snowflake design on the piece of paper. The other paper is now a dead cat, poisoned by the vial broken by your hubris.

    8. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 1

      Alternatively, superdeterminism.

      But scientists HATE that because it raises questions about the validity of science - surely the universe can't be like that?

      Of course, scientists also felt uneasy about rejecting the idea that FSM does not play dice.- surely the universe can't be like that?

    9. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      The mystery comes in at propagation of information. No matter how far the entangled particles are, the information about their state change is near instantaneous. If worm holes are involved it would certainly solve that problem but it's only moving the question on to how the wormholes can propagate information that fast. Using the usual explanation that a wormhole acts as a tunnel between two different positions in space-time is like describing a pot of boiling water as doing so because it's hot. Sure the concept is correct but it doesn't explain why the water is boiling like that, for that explanation you have to dive into what 'hot' is.

    10. Re:Mysterious quantum mechanical connection? by Uecker · · Score: 5, Interesting

      No it is much more interesting. What you describe is just classical entanglement. Quantum entanglement is more interesting, because you can do things you can't do classically: To see this, try to solve this riddle: A team of three persons is brought to the city of Zuerich and given the following challenge: They are allowed to discuss and then they will be brought to Paris, Rom, and Berlin, an either all of them will be shown a card with an X on it, or else, only one of them will be shown a card with an X and the other two of them will be shown a card with a Y. Each of them will answer with '-1' or '1', but they are not allowed to communicate by phone (or in any other way). If they have been shown three Xs, the product of all answers must be '1'. Else, the product of the answers must be '-1'. If the product of the answer is wrong, they will get killed (because good riddles have to be gruesome). What strategy does allow them to survive this challenge with certainty? Hint: Only quantum physicists can do this.

    11. Re:Mysterious quantum mechanical connection? by peragrin · · Score: 0

      a couple of others explained it closer to physics but lets take your example and run with it.

      You have two cards one with an A the other with a B .
      You insert each card into an envelope.
      You mail each in separate directions.
      at one destination you open to envelope and you have an A face up and facing towards you.
      You know that there is a B in the other evenlope but you don't know which way the card is facing in regards to opening the even lope.(facing you, upside down, backwards or some combination of those traits.

      --
      i thought once I was found, but it was only a dream.
    12. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 1

      Close... but it does get a bit weirder.

      You open the envelope and see letter A in it, and conclude that letter B is in the remote envelope. Then, you close your envelope and re-open it, and find letter B in it - which means letter A is in the remote envelope.

      If you are on the phone with the person who has the remote envelope, you will also discover that sometimes when both of you open the envelopes at the same time occasionally you both get letter A. In that case, what happened to the letter B? And how can letter A be in two places at once?

    13. Re:Mysterious quantum mechanical connection? by khallow · · Score: 1, Informative

      Alternatively, superdeterminism.

      Well, it doesn't match what we actually observe. And I'm not discounting here that there could be the possibility of an observer, say one external to our universe, for who superdeterminism is observed and for which there could be local hidden variables. But we're not in that chair and so that theory would not apply to us.

    14. Re:Mysterious quantum mechanical connection? by jafac · · Score: 2

      The key here, is "resolves to".

      That phrase means: "when we're trying to compute the state (A or B), we can't work out the formula until it arrives. (because we don't have enough information) - and when they arrive, bam! do the math, and the result is, A or B."

      Math works that way. It's a model for a physical process in nature. The actual mechanism for that physical process? We don't know. And all theories are impossible. (involve FTL travel).

      --

      These are my friends, See how they glisten. See this one shine, how he smiles in the light.
    15. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 5, Funny

      I think the real riddle here is to parse your riddle.

    16. Re:Mysterious quantum mechanical connection? by ubrgeek · · Score: 1

      I'm 100 percent not a physicist but I thought it wasn't really that the state is determined at the destination, but upon observation. So if some being outside of normal space/time/whatever were to peek into the envelope in transit then the state gets set right then.

      I'm Nnot sure all theories are impossible; the right one just hasn't been proven yet :)

      --
      Bark less. Wag more.
    17. Re:Mysterious quantum mechanical connection? by Impy+the+Impiuos+Imp · · Score: 1

      I was about to complain about using "effects" instead of "affects", but I believe "effects" (brings about) actually works here, too.

      --
      (-1: Post disagrees with my already-settled worldview) is not a valid mod option.
    18. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      If you take the time to work through this it's all quite understandable.

      http://lesswrong.com/lw/r6/an_intuitive_explanation_of_quantum_mechanics/

    19. Re:Mysterious quantum mechanical connection? by PopeRatzo · · Score: 3, Funny

      I'm not a physicist, but I've played Portal and Portal 2, and I also concur. I plan to play Quantum Conundrum tonight, to make more detailed observations of the phenomenon. I will publish my findings.

      My PhD is in Literary Theory, so I can likewise confirm the "weirder than that" part, because that was kinda my specialty.

      --
      You are welcome on my lawn.
    20. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      And all theories are impossible. (involve FTL travel).

      That doesn't make them impossible, because they involve FTL actions in a way such that they don't break causality, or allow communication of information, or movement of mass.

    21. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      Clarification: only local hidden variable theories have been ruled out. Non-local hidden variable theories have not, even though they are unpopular.

    22. Re:Mysterious quantum mechanical connection? by blue+trane · · Score: 1

      Non-locality is at least as weird.

    23. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      The mystery comes in at propagation of information. No matter how far the entangled particles are, the information about their state change is near instantaneous.

      There is no "propagation" of "information" occurring in entanglement.

      1. Nothing is propagating thru a medium.
      2. No information is being conveyed.

    24. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      Ok, so we can't determine state by direct measurement.
      How about this - is there a way to entangle such that A, B, and C are entangled, A can be observed, and B can be used to restore the entangled state of A? C would be used to restore B and the process would continue. A, B, and C would be used to represent the same stream of information.

    25. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      that made milk come out my nose... and I'm not even drinking milk.

    26. Re:Mysterious quantum mechanical connection? by mcneely.mike · · Score: 0

      It is not that one is A and the other B when posted; rather that they are each an AB, which, when revealed, resolves to an A or B.

      So if A is a live cat and B is a dead cat, then until resolved, both letters contain a cat which is both dead AND alive! Now, if anyone can give me Shroedingers address...! :)

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    27. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      You can't copy the quantum state of an unknown system. If you entangle a pair, changes to one half of the pair will uncontrollably change the state of the other half and/or break entanglement. The only schemes for transferring a state involve the destruction of the original (e.g. quantum teleportation), because you need a specific kind of measurement to finish the transfer.

    28. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      No FTL violation needed, we just need to understand how to manufacture tesseracts a bit better in order to make constructive use of their purposely shortened extra dimension(s). Just because it's not something readily observable in a common locality of relative space, it doesn't mean that property isn't there.

    29. Re:Mysterious quantum mechanical connection? by Narcocide · · Score: 2

      Note: I am not a physicist.

      Analyzing conflicting reports from other physicists on the true nature of Quantum Entanglement, I can confirm for you that a good percentage of them really want it to be this simple, and for nothing "spooky" to be happening at a distance, and will just about always fucking wig out on you if you point out the other physicists' views that it is in fact much weirder than that, and spooky stuff IS in fact happening at a distance.

    30. Re:Mysterious quantum mechanical connection? by CTachyon · · Score: 4, Interesting

      I am not a physicist.

      But I keep hearing that there is actually nothing mysterious about entanglement at all... Something along the lines of:

      You post 2 envelopes containing cards in opposite directions, one with a printed letter A, the other card with the letter B.

      At one destination, the envelope is opened to reveal the letter A. ... then through some mysterious quantum mechanical connection.... you know that the envelope at the remote destination contains the letter B.

      And that's about all there is to entanglement....

      Can any physicist confirm?

      I'm not a physicist, just a well-read layman, but...

      It is more mysterious than that, but if you go with the Many Worlds interpretation it's not much more mysterious.

      Basically, if you entangle letters A and B and send them in opposite directions, you're really creating two universes corresponding to the two possibilities: universe P (A here, B there) and universe Q (B here, A there). If you open the envelope to reveal A, for instance, then that copy of you in universe P now knows they exists in universe P, and likewise for B and Q. But unlike in classical physics, universe P is not completely separated from universe Q. P and Q still exist as a single mathematical object, P-plus-Q, and you can manipulate that mathematical object in ways that don't make sense from a classical standpoint.

      Basically, it all comes down to one small thing with big consequences. The real world is NOT described by classical probability (real numbers in the range [0,1]). Instead, the real world is described by quantum probability (complex numbers obeying Re[x]^2 + Im[x]^2 = 1).

      As it turns out, "system P-plus-Q has a 50% chance of P and a 50% chance of Q" is really saying "system P-plus-Q lies at a 45deg angle between the P axis and the Q axis". Starting from P-plus-Q, you can rotate 45deg in one direction to get orthogonal P (A always here), or you can rotate 45deg in the opposite direction to get orthogonal Q (B always here), thus deleting the history of whether A or B was "originally" here. (If P and Q were independent universes, this would decrease entropy and thus break the laws of physics.) Even more counterintuitively, you can even rotate P-plus-Q by 15deg to get a 75% chance A is here and a 25% chance B is here (or vice versa, depending on which quadrant the starting angle was in). Circular rotations in 2-dimensional probability space are the thing that makes quantum probability different from classical probability, and thus the thing that makes quantum physics from classical physics.

      Classically, A is either definitely here or definitely there, and until we open the envelope and look we are merely ignorant of which is the case. Classical physics is time-symmetric, and it therefore forbids randomness from being created or destroyed; classical probability actually measures ignorance of starting conditions. In a classical world obeying classical rules, you can't start from "50% A-here, 50% B-here" and transform it into "75% A-here, 25% B-here" without cheating. The required operation would be "flip a coin; if B is here and the coin lands heads, swap envelopes", and you can't carry that out without opening the envelope to check if B is here or not. Quantum physics is also time-symmetric and also forbids the creation and destruction of randomness, but quantum probability (also called "amplitude") is not a mere measure of ignorance. In the Many Worlds way of thinking, physics makes many copies of each possible universe, and the quantum amplitude determines how many copies of each universe to make. At 30deg off the P axis, cos(30deg)^2 = 75% of the copies are copies of universe P, and you experience this as a 75% probability of finding yourself in a universe with "A here, B there".

      (Or something like that. It'll pr

      --
      Range Voting: preference intensity matters
    31. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      OK, spooky action at a distance, we already knew that (probably).

    32. Re:Mysterious quantum mechanical connection? by Bonobo_Unknown · · Score: 1

      Is that not already weird?Now add the extra weirdness that you can't know what either envelope contains until you open it at which point whatever you find in the first envelope you will find the exact opposite in the other envelope. It's like if you had two dice, you can't tell what number is going to come up next just by looking at it. You roll the dice, which don't stop spinning until you focus your eyes on one die, at which point both stop spinning. You look at and note the result of the first die, then you look at the other die and it is always facing exactly the opposite of the first die. That's a bit weird.

      --
      We don't believe in radical loony monotheistic religions from the middle east -- we're Christians.
    33. Re:Mysterious quantum mechanical connection? by Bonobo_Unknown · · Score: 1

      Maybe they just forgot to declare the random number object as static?

      --
      We don't believe in radical loony monotheistic religions from the middle east -- we're Christians.
    34. Re:Mysterious quantum mechanical connection? by c0lo · · Score: 3, Funny

      that made milk come out my nose... and I'm not even drinking milk.

      That seems a good example of entanglement (quantum or not) weirdness.

      --
      Questions raise, answers kill. Raise questions to stay alive.
    35. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      Unfortunately, it's not that simple. In the scenario you're describing, there is hidden information inside the envelopes, as the direction of the cards has already been determined. The quantum mechanical analog is this is so-called "hidden variables", aspects of the state of a system that we simply can't see. But experiments have ruled out this possibility, so quantum mechanics is actually much weirder than that.

      They've only ruled out local hidden variables (which granted does apply to the envelope analogy). Non-local variables may still be needed to explain Quantum Mechanics. It wouldn't surprise me if it was a feature of any unified theory.

    36. Re:Mysterious quantum mechanical connection? by UnknownSoldier · · Score: 1

      > And all theories are impossible.
      Incorrect. If it the SAME photon being effected then that would explain Einstein's "Spooky Action at a Distance"

      > (involve FTL travel).
      That is a possibility; no one (yet) is able to confirm or deny that.

    37. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      Both superdeterminism and many-worlds are both local theories that do not contradict Bell's Inequality, because they deny counterfactual definiteness.

    38. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      What is the difference between calling it "the same photon" and it being a system wavefunction? You can absorb one and continue to do things with the other one, although maybe you want to argue that it is only absorbing part of the one photon. I'm not sure if what you are suggesting is any different than how quantum mechanics already treats systems, other than wonkier wording. Doesn't change the spooky action at a distance though, as actions performed on one end (like measuring the polarization of the photon in certain ways) will have effects on the other half at a different place ,whether it is two different parts of "a single photon" wavefunction or two different parts of a wavefunction describing the system.

    39. Re:Mysterious quantum mechanical connection? by Uecker · · Score: 1

      My apologies. But if you try, you might actually learn something which apparently only very few people understand: Why QM is weird.

    40. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      You post 2 envelopes containing cards in opposite directions, one with a printed letter A, the other card with the letter B.

      Implying that they aren't entangled.

    41. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      Alternatively, superdeterminism.

      Well, it doesn't match what we actually observe.

      That is not the slightest bit true. There has never been any evidence that present events are not determined by the past.

      But we're not in that chair and so that theory would not apply to us.

      That sounds like sticking fingers in your ears and saying 'la, la, la'. Either something exists or it doesn't. Something is true or isn't. Objectivity does not change based on what chair you are sitting in.

    42. Re:Mysterious quantum mechanical connection? by jafac · · Score: 5, Interesting

      A little insight from the experts should help to clarify:
              * Quantum mechanics is magic.- Daniel Greenberger.
              * Everything we call real is made of things that cannot be regarded as real. - Niels Bohr.
              * Those who are not shocked when they first come across quantum theory cannot possibly have understood it. - Niels Bohr.
              * If you are not completely confused by quantum mechanics, you do not understand it. - John Wheeler.
              * It is safe to say that nobody understands quantum mechanics. - Richard Feynman.
              * If [quantum theory] is correct, it signifies the end of physics as a science. - Albert Einstein.
              * I do not like [quantum mechanics], and I am sorry I ever had anything to do with it. - Erwin Schrödinger.
              * Quantum mechanics makes absolutely no sense. - Roger Penrose.

      --

      These are my friends, See how they glisten. See this one shine, how he smiles in the light.
    43. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      Bell's theorem has not been proven, but taken on faith.

      By Leggett

      [While] no single existing experiment has simultaneously blocked all of the so-called ‘‘loopholes’’, each one of those loopholes has been blocked in at least one experiment. Thus, to maintain a local hidden variable theory in the face of the existing experiments would appear to require belief in a very peculiar conspiracy of nature.

      From Bell himself

      a pair of spin one-half particles formed somehow

      Showing that they never accounted for all variables, nor even bothered to calculate the odds of likely divergence. They just expected a result, tested for it, got it, and ignored the rest.

      There really is no solution to the problem that the OP has presented at this time.

    44. Re:Mysterious quantum mechanical connection? by bill_mcgonigle · · Score: 2

      By proposing a sort of "worm hole" which, in effect, creates a single particle string with just the endpoints noticable by us as distinct particles, the entangled endpoint-tunnel-endpoint can transfer information outside the four-dimensional universe' ligh-speed limitation.

      It seems like they're getting closer, but isn't it still harder to think of an infinitely long wormhole connecting the two ends than to consider that the topology we experience isn't the fundamental one and those ends are still local in the 'real' topology, and not stretched to the bounds of the universe?

      --
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      OUTSIDE_IP=$(dig +short my.ip @outsideip.net)
    45. Re:Mysterious quantum mechanical connection? by tonywestonuk · · Score: 4, Interesting

      Imagine 2 envelopes, A and B. Inside both envelopes is a hidden binary code, just printed on a card.

      01001101000101101011011011.

      These envelopes are sent to Alice and Bob. However, Alice doesn't read the code directly. She first generates her own pseudo random stream of random 0's and '1's. She can control the ratio of 1's and 0's, by initially choosing an angle, and the Generator will spew out a sequence that all '0's if the angle is 0degrees, or all '1's if the angle is 90degrees, and any angle between 0 and 90 will adjust the ratio accordingly.

      Alice then X'ORs her stream of 0's and 1's with that printed on her card, in the envelope, to give a result.

      At the other envelope, BOB does exactly the same. He also has a pseudo random number generator, (using the same seed as Alice). When he sets his angle to 0, and Alice sets her's to 0, they will BOTH end up with the same sequence on the PRNG, and so XORing the number on the card will result in the same message. In fact when Alice and Bob set their PRNG to the same angle, they always will get the same sequence, and so their message will always match. Nothing spooky going on here.

      The spooky thing happens when Alice and Bob choose different angles. Lets say that Alice sets her angle to 0 degrees, and Bob chooses 30 degrees. They do the calculation, and it appears the final sequences correlate 3 out of 4 times.... or 25% of the time there is a difference between Bobs and Alices code. Bob then changes his angle back to 0, and Alice sets hers to -30 Degrees. Again, after doing the calculation, they work out that 25% of the time the codes differ.
      If alice sets hers to -30 and Bob sets his to 30, it would be common sense to say that there could be no more than 50%, the codes will differ. Except this is not the case. In the real world, using real entangled particles the result comes out to be 75%. What *must* be happening for this result, is the original hidden code printed on Alices and Bob's card MUST some how change, when the other party changes their angle.... OR, that there is no hidden code, but something else is going on... No hidden fixed sequence of numbers can explain the experimental results. This is 'Spooky' action at a distance, and can't be explained using traditional physics on its own.

    46. Re:Mysterious quantum mechanical connection? by hawkinspeter · · Score: 1

      I'm either 100% a physicist or 100% not a physicist, but I don't see the difference between "destination" or "observation". If you haven't observed it, then why do you think it's "in transit"? If you aren't observing it, then it literally could be anywhere. It's meaningless to talk about the state of something that you're not measuring; it's like talking about the colour of an invisible pink unicorn.

      --
      You're a temporary arrangement of matter sliding towards oblivion in a cold, uncaring universe
    47. Re:Mysterious quantum mechanical connection? by hawkinspeter · · Score: 1

      Or, you flip a coin. While the coin is spinning, you manage (somehow) to put the two halves of the coin into different envelopes and send them in different directions. When you open one enevelope and stop the coin from spinning, mysteriously, you can figure out that the other side of the coin is now the opposite value i.e. if you see heads in the envelope you open, then you know that the other envelope is tails.

      --
      You're a temporary arrangement of matter sliding towards oblivion in a cold, uncaring universe
    48. Re:Mysterious quantum mechanical connection? by rocket+rancher · · Score: 1

      Vaidman, is that you?

    49. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      Thru...?

      Really? your post is otherwise credible... but... thru.....

      What is this world going through?!

    50. Re:Mysterious quantum mechanical connection? by MtHuurne · · Score: 1

      After playing with the problem for a bit, I can prove that if the three people base their answer solely on the X or Y shown to them, they cannot produce a set of answers that is certain to produce the desired product. I am not a quantum physicist though, so it is not clear to me how quantum mechanics could help them in surviving.

    51. Re:Mysterious quantum mechanical connection? by Maury+Markowitz · · Score: 3, Insightful

      > You post 2 envelopes containing cards in opposite directions,
      > one with a printed letter A, the other card with the letter B.

      BZZZZT.

      You have 2 envelopes, one contains an "AB" and the other contains a second "AB". When you open the first envelop, the AB *turns into an A*, and the other envelope *instantly turns into a B*.

      What you are describing, where the contents have actual values before measurement, is known as "hidden variables". Einstein liked it. However, Alain Aspect demonstrated the universe simply doesn't work that way.

    52. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      The subject is not closed, though. Bell's derivation contains assumptions which a local theory might violate. It places restrictions on the local theory, it doesn't rule it out altogether.

      Equally, in the same way that Bell "rules out" hidden variables, Einstein "rules out" any communication faster than light, so a non-hidden-variable theory can't be true either.

      This leaves us with a paradox, not a definitive answer.

    53. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      Quantum physicists can't do this unless you allow entanglement experiments to be done and not count as "communicating by phone or in any other way".

      And if you allow communication via entanglement you have to allow the classicists to use their phones.

      Or you can just let the classicists return sqrt(-1) if they see Y which is kind of what the QM guys are doing anyway :p

    54. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      It would be kind of a subtle form of communication, in the sense it doesn't convey what the other person sees, but is only used as an arbitrator so that you can guarantee two people who get the Y do opposite things.

    55. Re:Mysterious quantum mechanical connection? by DaveV1.0 · · Score: 1

      I recently heard an explanation of entanglement by a physicist using the decay of a spin 0 particle into two particles (your two evelopes) with spin 1 (your cards). The result of that decay would be a particle with right spin 1 (A) and a particle with left spin 1 (B). He stated that detecting the spin of one particle determined the spin of the other.

      This is not a satisfactory explanation. We know that spin is conserved, so we know that each particle will have one of those values. If one particle has spin A, then by conservation of spin, the spin of the second particle MUST have spin B.

      Your '2 envelopes, one contains an "AB" and the other contains a second "AB"' is equally unsatisfactory because it means that each resulting particle has both spin left and spin right solely because we can't calculate which particle has which spin at decay time.

      Can you provide a better explanation?

      --
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    56. Re:Mysterious quantum mechanical connection? by hawkinspeter · · Score: 1

      Hmmm - that doesn't really clarify, but instead just makes quantum physics seem confusing.

      Here's a link to a nice series on explaining quantum physics that doesn't try to make it seem "magical", but instead is just the basis for how stuff works in the real world: http://lesswrong.com/lw/pc/quantum_explanations/

      --
      You're a temporary arrangement of matter sliding towards oblivion in a cold, uncaring universe
    57. Re:Mysterious quantum mechanical connection? by ubrgeek · · Score: 1

      Because the comment was based on the recipient actually receiving and reviewing the contents of the envelope. I was saying that if the envelope is "intercepted" en route then when it did eventually reach the intended recipient the state would have already been determined.

      And you have no way of determining whether I'm a physicist or not until I'm observed ;)

      --
      Bark less. Wag more.
    58. Re:Mysterious quantum mechanical connection? by hawkinspeter · · Score: 1

      If the envelope is "intercepted", then the interception point is the destination and the experiment is a different experiment than if it hadn't been "intercepted". In fact, you'd be performing two experiments - from the origin to the interception and from the interception to the final destination/observer.

      I have no way of telling whether or not I'm a physicist unless I observe myself.

      --
      You're a temporary arrangement of matter sliding towards oblivion in a cold, uncaring universe
    59. Re:Mysterious quantum mechanical connection? by Uecker · · Score: 1

      They prepare an entangled state using three spin 1/2 particles. More specifically, a Greenberger-Horne-Zeilinger state as a superposition of the all up and all down states (|UUU> - |DDD>) in the eigenbasis for the Paul matrix s_z. Each of them takes one particle and then measures with s_x or s_y corresponding to the card they are shown. While experimentally much harder to realize, the situation is much simpler than with two particles and Bell inequality.

    60. Re:Mysterious quantum mechanical connection? by Uecker · · Score: 1

      No, entanglement does not allow communication, because this would violate Einstein causality. Of course you could argue that the particles somehow communicate internally using faster-then-light communication in a preferred frame of reference, but this would be a new theory based on your own speculation.
      Yes sqrt(-1) is what QM does, but the physicists never get to see it. The magic is completely shielded behind the unpredictable results of the measurements.

    61. Re:Mysterious quantum mechanical connection? by Uecker · · Score: 3, Insightful

      Exactly, you can coordinate but not communicate. Which is still allowed by causality and special relativity. Isn't it amazing?

    62. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      "...My PhD is in Literary Theory..."

      Which explains why you have plenty of time to sit around an play games. You dont have a job.

    63. Re:Mysterious quantum mechanical connection? by jnrcorp · · Score: 1

      My understanding is that you can perform an operation on A when it arrives and B will represent that operation where ever it is. So, to keep the analogy, you can fold A in half and open it. Then when you look at B, you'll see a crease in the paper.

    64. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      The emitting of two particles with opposite orientated spins is only the start of the story, and doesn't highlight how it can differ from classical systems. Suppose instead of measuring whether the particles have spin going left or right, you measure if the spin is orientated up or down. If you do that with just a single particle with either a left or right oriented spin, you will get a 50-50 chance of getting an up or down orientated spin coming out (conservation isn't an issue since that change gets imparted by the measuring process). So if you have two independent particles you know to be either left or right orientated, and you measure up or down instead, 50% of the time you would get a combo of up & down, 25% of the time you would get two ups, and 25% of the time two downs (like flipping two coins). But if the pair was entangled as a superposition of opposing left and right pairs, you would always get a single up and a single down, showing it could have just been one left oriented and one right oriented particle from the start.

      The "weird" part is that one end doesn't know what type of measurement the other is going to make. One researcher could measure left-right, or up-down, or some angle in between, and the second researcher a different angle and you get a corresponding correlation depending on the relative angle of the two measurements.

    65. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      That is sort of close, you just need to add something along the lines of like the paper already having a random chase of having the crease or not, so you can't tell if the crease came that way, or if the other researcher created it, until you talk to the other researcher. Maybe a accurate but contrived analogy:

      Each letter comes in a sealed envelope, which has been folded in half. You don't know which way the letter inside got folded with the envelope: either folded so the print side would be inside the fold, or on the outside of the folded paper, but you were told both envelopes were folded the same way. It should seem obvious with such a setup, that opening one envelope told you how the paper in the other one is folded if untouched. To make it more like quantum entanglement though, you can add a "magic" ability to the envelope: as long as both are unopened, you can refold one and it causes the other fold to reverse. Normally if you refolded one envelope, you would end up with opposite folding for both papers. And this stays true to the quantum system in the sense you can't use it for communication. You can't tell whether the fold was flipped or not by the opposite researcher, as either way you would have a 50-50 chance of seeing it go one way or the other. Opening the envelope breaks the connection, so you can't look to see which ways yours is before deciding to refold or not.

    66. Re:Mysterious quantum mechanical connection? by EETech1 · · Score: 1

      IANAP, but I always thought it was more like keeping one blank card, and sending another blank card, and then once the card arrived, you took your card and wrote either an A or a B on it, and the same letter would appear instantly on the other card. If you later erased the A and wrote a B, the other card would then also instantly begin to show a B. However if either of you looked at the cards to see the letter, it may change both of them, or erase them both completely.

      Again... IANAP!

    67. Re:Mysterious quantum mechanical connection? by tendrousbeastie · · Score: 1

      To be fair, special relativity rules out travel faster than light, since it would lead to the travelling object having more than infinite mass and having a more than infinite time dilation.

      But it doesn't rule out instantaneous movement, since this doesn't really involve any motion - in the EPR paradox example, is anything moving at all, relative or otherwise, when the spins are measured?

    68. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      But how does this relate to Cuil Theory I ask you for a hamburger... *sorry, I couldn't resist*

    69. Re:Mysterious quantum mechanical connection? by PopeRatzo · · Score: 1

      Which explains why you have plenty of time to sit around an play games. You dont have a job.

      If I wanted a job, I'd have studied something boring like computer science.

      I worked for 25 years to get to the point where I could not have a job. That was the goal all along.

      --
      You are welcome on my lawn.
    70. Re:Mysterious quantum mechanical connection? by david_thornley · · Score: 1

      Special Relativity doesn't rule out FTL effects, just some possible ways of achieving it. It does mean that FTL is logically equivalent to time travel, which IMNSHO does count as weird stuff.

      --
      "When you have eliminated the unacceptable, whatever is left, however improbable, must be the truthiness" - Holmes
    71. Re:Mysterious quantum mechanical connection? by david_thornley · · Score: 1

      No, that's not how it works.

      Your model would allow FTL communication, which quantum entanglement by itself does not. (Note that "instantly", as used to describe events separated by space, really doesn't have a meaning, and IMNSHO simultaneity is the first thing you need to unlearn when studying Special Relativity.)

      A better analogy is two envelopes, and when you open one you get A or B, depending on the direction you opened the envelope in. If you opened it up-down or left-right, that tells you that somebody opening the other envelope the same way would see B or A, respectively. If you open the envelopes diagonally, things get more complicated, and the connection can only be verified statistically by having a lot of those envelopes, particularly if the other guy uses a different angle to open the envelope at. However, no matter what you do, you can't control what the other guy sees. You can only know what he sees, or probably sees, not influence it. No FTL communication allowed here.

      --
      "When you have eliminated the unacceptable, whatever is left, however improbable, must be the truthiness" - Holmes
    72. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      It conflicts neither with Aspect's experiments nor with subsequent CHSH-based experiments so long as you do not choose -- or be able to determine a priori -- which of the pair is "A" and which is "B".

      Such a system would lack local realism and might lack local hidden variables depending on the mechanism of the randomization of which envelope went to which "detector".

      Completely precluding the fixing of values for fully-detected fundamental spin-1/2 particle pairs at pair production time is still not within the realm of direct experiment.

    73. Re:Mysterious quantum mechanical connection? by khallow · · Score: 1

      There has never been any evidence that present events are not determined by the past.

      Except that there are simple two state change events which we haven't been able to predict.

    74. Re:Mysterious quantum mechanical connection? by EETech1 · · Score: 1

      Thanks for the explanation! I always thought that Quantum entanglement was the one thing that MAY be able to transmit data FTL. Is there some other quantum phenomenon that may offer the possibility to send information FTL that I have it confused with? Or is FTL (or instantaneous) quantum communication just a common misconception?

      Cheers!

    75. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      congratulations, you just nerd-sniped my whole team for two hours. Still no solutions so far.

    76. Re:Mysterious quantum mechanical connection? by liquidrocket · · Score: 1

      It is a common misconception. The laws of quantum mechanics, as they are currently known, do not allow any possibility of faster then light communication.

    77. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      I understood some of these words.

    78. Re:Mysterious quantum mechanical connection? by RespekMyAthorati · · Score: 1

      it's like talking about the colour of an invisible pink unicorn

      Pink?

    79. Re:Mysterious quantum mechanical connection? by hawkinspeter · · Score: 1

      But, is it still pink when it's invisible? Is "pinkness" an intrinsic quality or can only something being observed be pink?

      --
      You're a temporary arrangement of matter sliding towards oblivion in a cold, uncaring universe
    80. Re:Mysterious quantum mechanical connection? by Anonymous Coward · · Score: 0

      It's still pink. You should really stop walking around with you hands over your eyes.

  3. Synonym fun by wbr1 · · Score: 2
    If the work is 'forged' how can we trust it?

    Since it is physics, perhaps we could trust it better if it was 'LaForged'.

    --
    Silence is a state of mime.
    1. Re:Synonym fun by FatLittleMonkey · · Score: 3, Funny

      If the work is 'forged' how can we trust it?

      With an even temper.

      --
      Science is all about firing a drunk pig out of a cannon just to see what happens.
  4. Still won't work. by Anonymous Coward · · Score: 0

    Relativity at the very fundamental limits is absolutely broken simply because it is missing huge amounts of information. (namely dark matter and energy, hell, Higgs as well since we only just found it, maybe, and haven't been able to experiment with it much)

    Anything that throws out infinities is inherently broken, infinities do not exist in the real world outside of concepts. (and if they do, then we will figure that out when we have exhausted every other possible route)

    It is like trying to connect a themed jigsaw piece to a lego piece based on the same themed jigsaw. It will not work no matter how hard you force it. All it will do is break and result in many tears.
    I don't even know how to turn this in to a car analogy, it is late.

    1. Re:Still won't work. by boristhespider · · Score: 5, Interesting

      Relativity has little to do with dark matter or dark energy -- the matter content is irrelevant, since relativity only really dictates the geometry; basically you have an equation G=T, where G is the geometry and T the matter; what that matter *is* is something for someone else to worry about. It has absolutely damn all to do with the Higgs. The Higgs field is a part of the standard model of particle physics that gives fundamental particles their mass. It has absolutely nothing to do with relativity at all; if it did, we would already have a quantum field theory that was general relativistic in nature, and we'd all be laughing. Or crying, since many of us would now be out of a job.

      Quantum electrodynamics throws out infinities as a matter of course. This worried a lot of people, and then "renormalisation" was invented. It basically says "if you see a number multiplying an infinity, just write it as another number". The best example is the electron mass. What we see is actually m_electron * infinity. So we "renormalise it", and say that m_electron is actually m_bare electron * infinity.

      It was either Feynman or Schwinger - probably both - who expressed serious doubts about the mathematical validity of renormalisation. Thing is, as they also acknowledged, it works. QED is the most accurate theory we currently possess, so despite the air of bullshit that surrounds renormalisation something's obviously working fine.

      The issue comes when you have theories that are non-renormalisable, so you can't ditch the infinities this way. Quantising general relativity typically leads to a non-renormalisable theory. That's where all our problems have been for the last sixty years...

    2. Re:Still won't work. by c0lo · · Score: 1

      Relativity at the very fundamental limits is absolutely broken simply because it is missing huge amounts of information. (namely dark matter and energy ...

      Dark matter/energy are the consequence of assuming time/space being homogenous/isotropic - given that we haven't got out from the near neighborhood of the Sun (thus we haven't tested these assumption at larger scales), isn't it possible that these assumption don't hold true?

      --
      Questions raise, answers kill. Raise questions to stay alive.
    3. Re:Still won't work. by Anonymous Coward · · Score: 0

      Kadanoff groups gave mathematical footing to renormalization.

    4. Re:Still won't work. by david_thornley · · Score: 1

      Note that infinities and singularities can be a feature of the mathematical description rather than reality. For example, any mapping of a sphere to a plane will have at least one singularity (the usual latitude and longitude has singularities at the 180th meridian, including North and South Poles), but the ground or water or ice or whatever there doesn't have any special properties).

      --
      "When you have eliminated the unacceptable, whatever is left, however improbable, must be the truthiness" - Holmes
    5. Re:Still won't work. by Anonymous Coward · · Score: 0

      what that matter *is* is something for someone else to worry about

      Unless of course you are interested in the mechanisms that generate the metric, as many physical cosmologists are...

  5. Spooky Action by Anonymous Coward · · Score: 4, Funny

    At a certain point quantum physics causes a spooky action in the space between my ears leading to a "Duh, what the heck/" experience.

    1. Re:Spooky Action by TrollstonButterbeans · · Score: 1

      I am disappointed the above is the only "Spooky action at a distance post" --- W.T.F. this is Slashdot!!!

      (Einstein coined the term "Spooky action at a distance" for any muggles who don't get the reference .... sigh ... Slashdot 2013 this is probably most people ... ugh).

      --
      Priest: "Universe from nothing, no laws of physics, sped up time"+ huge discrepancies. Creationism? No. Big Bang Theory
  6. the holographic principle, yet again by Anonymous Coward · · Score: 0

    i'm really curious why more people havent been paying attention to mathur's idea of fuzzballs which resolve the singularity and information loss problems in a way that obviates the need for the holographic principle and therefore all of this work.... is theoretical physics too invested in all the time its spent on the information paradox the acknowledge that mathur's solution is porbably the correct (albeit boring) one?

    1. Re:the holographic principle, yet again by Anonymous Coward · · Score: 0

      There are shit-loads of bespoke formulations that sort-of-kind-of explain QM and/or relativity. The question is, do they make different testable predictions from conventional theories. If not, they aren't useful.

      You can express some variant of 2+2=4 in a whole bunch of different mathematical spaces, of varying complexity, but they are all just saying the same thing, merely in a transformed way. In physics, it's when you get something saying that 2+2 can equal 5 in a certain context, and then can do an experiment or ten than show this new formulation actually works in that context, that you see progress in understanding the actual phenomena.

      Until you get that difference, you can't tell whether the new formations are saying anything useful, or are just a transformation of existing theories into a different kind of maths. (Ie, are they saying exactly the same thing in a different way, or are they really saying something different.)

  7. Maybe it's the same particle by Anonymous Coward · · Score: 2, Insightful

    It just looks like it's in 2 seperate places at once. This would solve the whole "faster than light speed communication" problem pretty easily if they could come up with a theory utilising extra dinensions to explain it.

    1. Re:Maybe it's the same particle by c0lo · · Score: 2, Funny
      --
      Questions raise, answers kill. Raise questions to stay alive.
  8. I'm the first to admit... by istartedi · · Score: 2

    I'm the first to admit that anything quantum blows a wormhole through my head. I struggle to find anything that will allow me to grasp it. I'm a programmer, dammit.

    "God doesn't play dice with the Universe"

    OK, whatever.

    Maybe, just maybe, "God doesn't waste CPU cycles rendering windows that are trivially culled from the scene graph".

    So. When you observe the particle its window comes to the top and The Program has to do all the rendering calculations.

    Cue attempt by actual physicists to explain why this attempt to grasp the concept is totally inadequate or the more enjoyable funny bits about how the Universe is written in either Lisp or Perl.

    --
    For all intensive purposes, "whom" is no longer a word. That begs the question, "who cares"?
    1. Re:I'm the first to admit... by Charliemopps · · Score: 5, Interesting

      I went to a local physics lecture a while back and a bunch of physicists tried to explain some things to people that were interested. They all took questions and such, it was a lot of fun. I asked one of them "But what do I have to do to 'get' relativity. I believe in it, I think it's been scientifically proven. I've read LOTS of books on the subject but I still just can't make my brain do it!" and he gave about the best reply I've ever gotten to a question. Paraphrasing he said "We don't get it either. I have study mathematics my entire life. I have 3 PhDs. I've designed machines that take advantage of many of Special relativities theories. I've proven those theories in hundreds of lab experiments. But I cannot make my brain understand it either. What I can do is prove it with math. Numbers cannot lie. We take very careful measurements, we use near savant like theories and prove them scientifically. In the whole of human history I'm willing to bet the number of people that could actually picture how relativity, special relativity, and higher level dimensions work in their mind could be counted on 2 hands. So don't feel bad, we're all in the same boat."

      I guess he could have been just trying to make me feel better. But I believed him.

    2. Re:I'm the first to admit... by Anonymous Coward · · Score: 0

      The Universe is actually a computer simulation?

    3. Re:I'm the first to admit... by Anonymous Coward · · Score: 1

      Depends on what you mean by "get." If you meant understand well enough to apply and get things done with, then being able to crunch the numbers and algebra is all you need. If you mean have an intuitive sense of what is right, that is quite possible on some level with GR. There are plenty of visuals and analogies, some more exact than others, that as long as you understand the limits of, you can intuit the answer and be right for many situations, or have a sense of when you made a mistake in the math.

      But there will always be a level where something is too messy to rely on intuition. Do people "get" algebra or calculus? But you can easily create a formula or integral that even skilled mathematicians will have little sense of what they do from just glancing at them. Doesn't even have to be math, you can take a social situation and add enough people or messes into it so that people lose sense of what is going on.

    4. Re:I'm the first to admit... by WaffleMonster · · Score: 2

      I'm the first to admit that anything quantum blows a wormhole through my head. I struggle to find anything that will allow me to grasp it. I'm a programmer, dammit.

      Perhaps a close mental computer analogue is the transaction.

      s/entanglement/transaction/
      s/collapse/commit/

      Software is not allowed to peer into a transaction and act on details while open or consistency could not be guaranteed. Only outcomes are exposed to the system when transaction is committed. Various interactions force existing transactions to commit and resulting outcome to be known.

      So. When you observe the particle its window comes to the top

      In scalable systems "reading" or "observing" is often a liability to be carefully minimized. Anything read out stands a good chance of becoming stale and outdated the second it leaves the computer. In the real world "observing" is almost certainly an illusion.

      What we see as "read" operations are emergent properties of layers of interaction. Our eyes only see by absorbing photons and similar disruptive explanations likely exist for all methods of "observation".

    5. Re:I'm the first to admit... by Anonymous Coward · · Score: 0

      Sounds nice, but the problem is that numbers do lie - all the time. Mathematics is just another human invention, it is no more perfect than any other human invention which is one of the reasons paradoxes can exist in maths. People tend to think, "OK, I've got ten toes, I'm confident that fact is correct", and extrapolate from that to give maths far more relationship to reality than it deserves. You only have to be reminded that we count from zero, not one, to begin to see where the 'wiggle room' can enter the equation.

    6. Re:I'm the first to admit... by Anonymous Coward · · Score: 0

      Math doesn't lie, people lie (or unintentionally mislead), either by saying the wrong things or by omitting something. It is like saying letters lie, because people lie using English. Math can at least convey things much more concisely than English for a broad category of situations though, and allows you at least to check if the reasoning is sound or if the premises contradict.

    7. Re:I'm the first to admit... by wonkey_monkey · · Score: 1

      He totally gets it. He just didn't want you to feel bad.

      --
      systemd is Roko's Basilisk.
    8. Re:I'm the first to admit... by Anonymous Coward · · Score: 0

      Heh, yes, this all occurred to me too.

      Special Relativity = "oh no, things are going too fast and I'm missing collisions, better have a fixed speed limit ... but let's make it impossible to actually hit that limit and mess things around as you approach it so you don't notice there's a limit unless you look really hard". I have actually coded this in a real game.

      Quantum Mechanics = "oh no, way too much to simulate, let's just calculate things the player is looking at, and make everything else probabilistic. Oops, we introduced a free energy exploit, let's add a non-local communication hack to fix that."

      General Relativity = "oh shit there's still way too much visible stuff near the player, we need more time to simulate it - hey, let's slow his clock down too so he doesn't notice".

    9. Re:I'm the first to admit... by david_thornley · · Score: 1

      Special Relativity: you can get an intuitive understanding of this. I did. It takes a lot of unlearning of basic concepts. Simultaneity is a killer, and creeps in everywhere.

      General Relativity: every description I've ever seen either includes a lot of handwaving and generality, or is based on tensors, which I personally just don't get intuitively. I know what they are, and something of how to use them, and what they represent, but the intuition just isn't there.

      Higher level dimensions: the only possible intuitive experience I've got with that was doing some odd mind exercises as a teenager, in which I have a distinct memory of imagining four mutually perpendicular lines simultaneously for a very short time. I couldn't hold the imagination long enough to verify it, and I'm not sure I'd trust my memory completely when doing weird stuff like that.

      --
      "When you have eliminated the unacceptable, whatever is left, however improbable, must be the truthiness" - Holmes
  9. How exactly do they know it's not predetermined? by Anonymous Coward · · Score: 0

    What if the act of entangling to objects "orients" them in such a way that their measured states will always be opposite?

    If you separate two entangled objects by 1000 km and measure their states, how do we know that the result would have been different if we measured them when they were 1cm apart?

  10. Wormholes gopherholes and unicornholes by Anonymous Coward · · Score: 1

    imagined entangling the quantum states of two black holes. They then imagined pulling the black holes apart. When that happens, they argued, a bona fide wormhole forms between the two black holes.

    Yet back in the real world we don't even know what the gravitational influence of a single photon propagating thru space looks like.

    âoeThe wormhole and entangled pair don't live in the same space,â Karch says. But, he adds, mathematically they are equivalent.

    Or could it be yet another instance of mathematicians fooling themselves into believing their own delusion? Or flying unicorns? Wake me up when you have made a useful testable prediction. Until then what is the point of advertising your work?

    Wormholes are regions of less density than surrounding space. Entanglement is rules enabling coherent interaction of all that interacts.

    I'll consider a connection and reevaluating my beliefs after useful, testable predictions are enumerated. Until such time I wish this cast of characters all the best in their endeavors.

  11. non-physicist non-confirmation by globaljustin · · Score: 0

    Can any physicist confirm?

    call me cynical, but knowing academics (and those who pose as such) I'm sure that no matter how good your analogy is, they will take the areas where the analogy fails and tell you that you are wrong because of it...

    all analogies have huge holes...the Scrodinger Cat analogy for example...

    nitpicks aside, I agree that the idea that "Quantum" behavior is somehow mysterious, opaque and difficult for laymen to understand is bound in failings in academia (too much competition, not enough money).

    to TFA, I myself came here to say that I honestly thought a link between "entanglement" and wormholes had already been established and was accepted.

    I honestly feel like the problem is NOT with you, a layman, or your analogy, which is fine for understanding the concept of **non-locality** which is core to undrestanding what makes quantum physics "quantum"

    Academia has folded in on itself because of Lord of the Flies like competition. Just recently /. had an article on it...comparing getting Tenure to becoming a drug lord>

    My experience in CS and IT Engineering has shown the same.

    People must stake their *whole careers* on overly specific theories that are not their own...almost no PhD's, even in physics increasingly, do actual **new research** in the best areas. Because of the competition, older acadmecs see it as part of their job to entrench themselves and the theories **they** have devoted themselves into the DNA of the org.

    It's how MBA types work...but it has spread to academia. Everyone wants to put their thumb in the big piece of cake to keep it for themselves.

    What I'm saying is, your analogy is just fine, and its the fault of academia that the published research hasn't caught up with even **common understanding**

    --
    Thank you Dave Raggett
    1. Re:non-physicist non-confirmation by Anonymous Coward · · Score: 1

      I feel sorry for the fields of CS and IT Engineering then. I don't know anyone who go their PhD without doing new research, with about the worst you could say being it was menial or lacks general implications. I also know a large number of coworkers who put considerable effort in outreach, both related and unrelated to their particular research. This ranges from building demos so people can see and play with things first hand to teaching free seminars and courses on things.

      I'm not even sure how it makes sense that keep people dumbfounded by quantum mechanics would help academics. It is much harder to sell something or get people to appreciate your work if they don't understand it. I've seen firsthand how people are more supportive of work they understand better, and are more willing to support funding for such work. And understanding the basic principles of quantum mechanics, or even everything covered in the undergrad and graduate level intro courses on the material, is a long way from the experience needed to compete in research in related fields. So helping people understand that is in no way a threat to their jobs. It is more of a threat to pseudoscience/new age scams that re-purpose words from quantum mechanics if anything.

      I do agree that it is a failing of researchers to not come up with better analogies. But that doesn't mean all analogies and their holes are equal. Unfortunately, some common analogies don't make it clear what is actually the hole, and instead teach the hole as much as, if not more, than the actual principle trying to be conveyed. The result is only confusion when people are told they are wrong, even though their logic may be sound, but because they're premises were wrong to begin with due to faulty analogies.

  12. good call by globaljustin · · Score: 1

    see, ^^^this is how you talk about physics in common language!

    how many times do we scientists alienate people by trying to sound smart instead of making a connection to **their** a priori knowledge?

    --
    Thank you Dave Raggett
    1. Re:good call by Anonymous Coward · · Score: 0

      Except this example directly drives one of the bigger misconceptions about quantum entanglement: that you can chose what outcome you get at one end and force a particular outcome at the other end. This is one of the reasons people think it obviously leads to faster than light communication, because they think, "If the results are always the same or opposite, I just pick one to communicate a 0 and the other a 1, etc."

      You might be slightly better off describing it like a Polaroid that when you shake it displays a specific letter (assuming non--hipster kids know what those are) , because you don't get to chose what it develops into. Although it misses a big part of entanglement still, where there are manipulations you can apply to one end, that do cause changes to both ends, but not in a way that is measurable at one end only.

    2. Re:good call by Anonymous Coward · · Score: 0

      how many times do we scientists alienate people by trying to sound smart instead of making a connection to **their** a priori knowledge?

      I don't know how many do that, but I wouldn't be surprised when those that spend the time to discuss and propose improved analogies get chewed out by some arsehole. I am sure telling scientist that do try to communicate with people to piss off will encourage dialogue.

    3. Re:good call by hawkinspeter · · Score: 1

      Is it 57 times?

      --
      You're a temporary arrangement of matter sliding towards oblivion in a cold, uncaring universe
    4. Re:good call by Anonymous Coward · · Score: 0

      42

  13. Here... XKCD by Anonymous Coward · · Score: 1

    http://xkcd.com/224/

    That said, I have no fucking clue what you were trying to say.

  14. This action at a distance by jarek · · Score: 2

    This action at a distance nonsense just has to end someday. This is no such thing implied by Bells theorem or entanglement experiments such as those by Aspect. Just let it go. Entanglement just explores the non-classical nature of quantum probability. The outcome of experiments with entangled particles is predicted by the standard Dirac notation and no mysterious action is needed.

    1. Re:This action at a distance by Anonymous Coward · · Score: 0

      The outcome of experiments with entangled particles is predicted by the standard Dirac notation and no mysterious action is needed.

      Yes, basic bra ket notation makes entanglement easy to work with, but that doesn't mean it does away with action at a distance. It treats the system as a whole, and if you do something like project a polarization state onto another axis, it changes the whole system at once. That is still action at a distance, even if the notation makes figuring out the results of measurements really easy.

    2. Re:This action at a distance by jarek · · Score: 1

      No, it just breaks the realism aspect of physics. If you hold on to it you need to violate relativity so in a sense physics had to choose what aspect of nature is the most fundamental, relativity or realism and relativity "won".

    3. Re:This action at a distance by Maury+Markowitz · · Score: 2

      > This is no such thing implied by Bells theorem or entanglement experiments such as those by Aspect

      In QM, sure. In classical mechanics or relativistic treatments, there most definitely is.

      That's the beauty of Bell. You are forced to choose between accepting the weirdness of QM, or demanding FTL information transfer. The relativists consider the later to be even worse than the former.

  15. Re:Bunk by Anonymous Coward · · Score: 1

    Black-holes are not wormholes and wormholes are not black holes... Black-holes are a collection of phenomena that surround a singularity.

    While they are not identical, in the sense there are versions of worm holes distinct from black holes and certainly black holes that are not worm holes, the two are still well connected concepts. One of the "phenomena" that is part of that collection related to singularities is trying to deal with coordinate problems instead of the event horizon when trying to solve the Einstein field equations, and there are versions that include world lines entering then leaving into a space-time distinct from that which surrounds the black hole. That involves a crap ton of assumptions, but nonetheless, there is a lot of overlap between black holes and worm holes, especially when looking at work in GR instead of scifi stuff.

  16. Re:Bunk by Anonymous Coward · · Score: 1

    I have more faith in this "Science" magazine then I do in a somebody named "Charliemopps".

  17. Re:Bunk by HellCatF6 · · Score: 1

    Please mod this guy down a few points. It's one thing to do physics as a hobby, it's another to be a professional getting written up in Science.

  18. Re:How exactly do they know it's not predetermined by Anonymous Coward · · Score: 0

    By performing experiments that rotate the orientation of one half of the pair. If they were predetermined, nothing would happen to the other half when they are finally measured. But instead, we find that they maintain their opposite orientation, and you never see for example them having the same orientation. Whereas if you say just had two coins placed one heads up and one heads down, and randomly flipped them, you would occasionally get two heads and two tails.

  19. it spans all disciplines by globaljustin · · Score: 0

    I feel sorry for the fields of CS and IT Engineering then.

    ugh...**more** Lord of the Flies academia pissing-contest bullshit!

    this problem spans disciplines...I commented based on my experience and I **assumed** a level of knowledge on my /. readers...I assumed they'd know that typically CS and especially engineering tend to be immune to this bullshit....

    that's the problem...

    theoretical physics (thanks Cambridge) and the engineering disciplines are becomming as bad as a fucking mail order Literature PhD

    just because you know people who dont do this doesn't disprove my point, in fact, from reading your comment it seems you agree with the core of my criticism

    why not just say you agree? why start off perpetuating the same pointeless academia pissing contest crap you admit is a problem???

    --
    Thank you Dave Raggett
    1. Re:it spans all disciplines by Anonymous Coward · · Score: 0

      commented based on my experience and I **assumed** a level of knowledge on my /. readers

      As the AC that responded, I took what you said at face value, and assumed what you said is accurate of the CS and IT engineering fields. It quite clearly conflicts with what I've seen in astronomy, physics and electrical engineering fields. So either I give you the benefit of the doubt, and take your description to be accurate meaning those fields have bigger issues, or I assume that most fields are roughly the same, and then that means your perspective is out of whack. I choose in the previous post to assume you had some level of knowledge too.

      And I don't see how it is some pissing contest or analogous to Lord of the Flies. How does seeing problems in another field help me in physics? If CS, or any other useful field has bigger issues, that would suggest it should get more resources to fix those issues. And CS and IT are much more relevant to most businesses and many people's daily lives than theoretical physics. Am I supposed to treat people as being so naive that I should expect problems with CS will make people not spend money on computers and related work and instead spend more on physics?

      theoretical physics (thanks Cambridge) and the engineering disciplines are becomming as bad as a fucking mail order Literature PhD

      I've seen nothing like this. Just as you say knowing a few counterexample people doesn't make a point, neither does knowing of a few that find the easy street on their PhD. The vast majority on the other hand, I have not seen this with my former fellow students, coworkers, or current students. While there is a need to always be vigilant for abuses of the system, your statement is such an exaggeration, your view is either disconnected from reality, or has so much misplaced hyperbole to be meaningless.

      Also, when I say I know some coworkers, I'm not talking about the one or two guys I know. More than half of dozens of people I interact with daily in the physics department I work in have been involved in physics outreach projects. There are additionally many more outside of that circle in the department, some of which I only know because I see that regularly at such events. The top reason I see for people not getting involved are either because they are involved with something else and don't want to give up their free time, or because they are lazy. That is a long ways away from saying they doing so because it helps their career or from a need to be entrenched.

      why not just say you agree? why start off perpetuating the same pointeless academia pissing contest crap you admit is a problem???

      We seem to agree on one starting point, that people working on the details of a theory are large part responsible for how it is communicated. But that agreement ends rather quickly, and diverges even more in your reply. You seem to almost be borderline conspiracy theory about it, thinking it is the result of everyone being cut throat. At least from many years in the physics research community, I see the problem as part apathy, and part being a really hard problem. In many cases, it is not a problem because it is purposely ignored or rejected as important, but despite massive effort to try and solve or improve. And this seems like a situation where a fundamental misunderstanding of the source of the problem has a big impact on what you would do to try and solve it.

    2. Re:it spans all disciplines by Anonymous Coward · · Score: 0

      "theoretical physics (thanks Cambridge) and the engineering disciplines are becomming as bad as a fucking mail order Literature PhD"

      For someone complaining about pissing contests in academia, you have no problem pissing on literature majors...

  20. tachyonic anti-telephone by globaljustin · · Score: 1

    yes, it indeed **does** mean that, if *non-locally* entangled, we could have **faster than light communications**

    maybe you're the one who should read up...the layman has one up on you using their logic:

    http://en.wikipedia.org/wiki/Tachyonic_antitelephone

    read it and weep...you're wrong and the layman was right

    --
    Thank you Dave Raggett
    1. Re:tachyonic anti-telephone by Anonymous Coward · · Score: 0

      That seems completely unrelated to the parent post. I said nothing about FTL in general, only that people falsely draw the conclusion that quantum entanglement leads to a trivial FTL communication of classical information. Even if someone develops a complicated scheme to do so, that is not a counter point to what I said. Or are you trying to imply that quantum entanglement does imply a trivial FTL communication scheme? Quite a bit has been written about how that doesn't work, and with a bit of math background, it can be explained quite succinctly.

      Anyway, the previous post was not making a point about FRL in general, but that when you make a measurement or perform other actions, you don't get to chose which outcome you get while maintaining the entanglement. Someone can't just say, "I decide to print an A on the paper," and have a B appear on the other piece of paper. There is an important point that whatever you do to one end, while it can change the system as a whole, still eaves both ends looking the same until you attempt to correlate the results from both ends. You don't get to choose if you get an A or B, preventing you from sending message to a person with the other piece of paper by having them watch for an A or B.

    2. Re:tachyonic anti-telephone by Anonymous Coward · · Score: 0
  21. Re:Bunk by TrollstonButterbeans · · Score: 1

    Seconded! Eyes bleeding ... please mod down. Physics isn't about opinion or what people think or analogies they understand --- that isn't the backbone of science. Who cares if you understand, that's your responsibility --- not others to explain it to you.

    --
    Priest: "Universe from nothing, no laws of physics, sped up time"+ huge discrepancies. Creationism? No. Big Bang Theory
  22. Re:Bunk by Anonymous Coward · · Score: 0

    Atoms are also small enough that quantum effects are significant in understanding their behaviour, and they're not yet at a macro level. Basically anything whose de Broglie wavelength is large enough to be on the scale of the object itself exhibits clear particle behaviour. An object like a baseball (weighing 150 g) thrown in a fastball (approx 90 mph or about 40 m/s) has a momentum of 6 kg m/s. The de Broglie wavelength of the fastball is thus 7.36e-36 m, far smaller than the baseball, so quantum effects would be negligible and it would be just about as accurate to use the classical equations of motion to describe its behaviour rather than the Schrödinger equation. A hydrogen molecule has a mass of 3.35e-24 kg, and at a temperature of 298 K has a velocity of about 99 m/s from the kinetic theory of gases. It thus has a de Broglie wavelength of approximately 2 picometres, whereas the hydrogen molecule is something like 74 pm or so, not too far off, and quantum effects start to become significant. At lower temperatures (say 1 K), the molecular velocity goes down to 5.7 m/s, and the de Broglie wavelength becomes 34 pm, and quantum effects become really significant (e.g. Bose-Einstein condensation).

  23. Re:Bunk by TrollstonButterbeans · · Score: 1

    Plus I dislike the idea of someone spelling "partical" wrong and also claiming to have an "idea" on the subject. You don't spell particle wrong and also have a good set of knowledge in physics.

    --
    Priest: "Universe from nothing, no laws of physics, sped up time"+ huge discrepancies. Creationism? No. Big Bang Theory
  24. Re:Bunk by Anonymous Coward · · Score: 0

    The best theory I've read on the subject, or maybe better to say, the theory I have the most faith in at the moment is that the reason sub-atomic partical behave so completely different that macro-level particles like atoms is because they are in fact NOT particles. They are something else that we don't quite understand yet. It's very hard to call them particles when they in no way behave like particles.

    Or we just found out that particles act differently than expected from day-to-day intuition. And it isn't that completely different, it is just a superset of behaviors, because you can re-derive classical behavior from quantum systems.

  25. Only ruled out local hidden variables. by Anonymous Coward · · Score: 0

    Please moderate this up, it's the correct answer (and yes, I hold a physics degree).

    Get a refund. They've only ruled out local hidden variables (which granted does apply to the envelope analogy). Non-local variables may still be needed to explain Quantum Mechanics. It wouldn't surprise me if it was a feature of any unified theory.

    1. Re:Only ruled out local hidden variables. by quax · · Score: 1

      This was an answer to the envelope example, and my intent was mostly to not have this stand unrefuted at a certain filter level.

      I am well aware that non-local hidden variables are not ruled out, nor do I find this idea particularly unattractive. But if they were in play QM would still be plenty strange.

  26. Re:Bunk by Anonymous Coward · · Score: 0

    You could say the singularity is the star of the show in a black hole, but strictly speaking, the laws of physics outside of a black hole would not be affected if the space inside the black hole folowed completely different laws (modulo conditions at the event horizon).

    The event horizon is the point at which you can't rely on observation to resolve your questions.

  27. they have reason to think that by globaljustin · · Score: 2

    this is about a condescending phrase you tossed off about laymen and how analogies give them wild notions...

    This is one of the reasons people think it obviously leads to faster than light communication, because they think, "If the results are always the same or opposite, I just pick one to communicate a 0 and the other a 1, etc."

    and that is ***exactly*** how the tachyon anti-telephone works

    someone with a fucking PhD saw the same behavior as the layman, and made a theoretical faster-than-light telephone design based on it

    bottom line is that you're wrong in saying that analogies are bad because they give laymen wild ideas...in fact they have **pretty fucking cool ideas**

    --
    Thank you Dave Raggett
    1. Re:they have reason to think that by Anonymous Coward · · Score: 1

      and that is ***exactly*** how the tachyon anti-telephone works

      But that is not how quantum entanglement works.

      You still have not said anything about quantum entanglement being used for faster than light communication, and have gone off on an unrelated direction. Saying quantum entanglement does not allow faster than light communication, as is derived from some simple math, is not the same as saying FTL is impossible in general. If someone was trying to talk about the equal transit time fallacy of how people commonly talk about how airplane wings work, and you try to counter with, "But airplanes exist!" You're completely missing the point, and aren't doing anything to help with the issue that one particular analogy teaches more wrong than right.

      And are we supposed to teach things in general incorrectly because it might inspire people? Should we start teach the four elements as the current understanding in physics class because it might inspire someone's imagination? And I am not saying we shouldn't teach classical and previous ideas, they are actually quite useful in a physics class, but a distinction is made between failed ideas and current ideas.

      saying that analogies are bad

      I didn't say analogies are bad, I sad that particular analogy is bad.

    2. Re:they have reason to think that by Anonymous Coward · · Score: 0

      Read your own article, the whole point of the tachyon anti-telephone is that according to our current understanding, it is not possible. You make a great example of why honest "professionals" don't usually like to talk to "lay people" about their profession unless there's money involved. The more marketing driven professionals took note that "tachyon anti-telephone" wiped out all your memories of "not possible" and makes you want to buy into their popularized media, without even having to lie to you and lose credibility with their peers, cause you'll do that all by yourself.

    3. Re:they have reason to think that by hawkinspeter · · Score: 1

      You do realise that the tachyon anti-telephone doesn't actually exist due to tachyons not existing (as far as we know).

      I appreciate that you're celebrating the wild ideas that laymen can have, but analogies are bad if they mis-represent what is happening as they're supposed to make things clearer, not murkier.

      --
      You're a temporary arrangement of matter sliding towards oblivion in a cold, uncaring universe
  28. high off your own supply by globaljustin · · Score: 0

    you're being unreasonable...

    It quite clearly conflicts with what I've seen in astronomy, physics and electrical engineering fields. So either I give you the benefit of the doubt, and take your description to be accurate meaning those fields have bigger issues, or I assume that most fields are roughly the same, and then that means your perspective is out of whack.

    Or, your perception could be wrong!

    Or, your collegues and students don't naturally talk to you, a seasoned professor, about the problems from seasoned professors!

    It is clear you have already decided how you think about this, as most professors typically do, and are just competing with yourself to see if you can rhetorically "put me in my place"

    You are part of the problem, even if it is in a small way.

    --
    Thank you Dave Raggett
    1. Re:high off your own supply by Anonymous Coward · · Score: 0

      Who said I was a professor? For better or worse, you can work for decades in academia now without being tenure track or even in a teaching position. And while there is plenty of bitching and whining about professors and other positions in academia (while some may be afraid to saying thing, quite a few people are not) it doesn't align with what you're saying here. It sounds more like you took bits and pieces of actual issues and complaints, and remolded way out of context or applied them toward things with no connection.

  29. they reason think that by globaljustin · · Score: 1

    If someone was trying to talk about the equal transit time fallacy of how people commonly talk about how airplane wings work, and you try to counter with, "But airplanes exist!" You're completely missing the point, and aren't doing anything to help with the issue that one particular analogy teaches more wrong than right.

    that's like saying a person who makes a particular analogy that describes a real behavior theorized in reality is making harmful assumptions because your myopic understanding of physics terms and how they are used in conversation compared to in specific literature triggers your egotistical need to use jargon and your knowledge of the history of a certain research to counter updated understandings of how something like non-local quantum entangled particles are theorized to behave and thereby insult a layman AC who actually had the right idea all along

    --
    Thank you Dave Raggett
    1. Re:they reason think that by Anonymous Coward · · Score: 0

      Trolling the non-political articles too now, huh. Sad.

  30. it's like that and that's the way it is by goombah99 · · Score: 2

    To expand on your reply, here's a different letter game.

    you mail two letters with magic XY cards inside. When the first letter is sliced open the probability it shows and X or a Y is equal. If the first letter is sliced open left to right then the other letter will match the contents of this letter. If you open it right to left then the other letter will show the opposite letter.

    There's no way the contents of the letters can predetermine the outcome. (i.e. No hidden variables can explain all the possible outcomes). Notice also that this can't be used to transmit information faster than the speed of light. But by doing the experiment we can confirm that the choice of which way to slice changed the outcome of the remote envelope.

    --
    Some drink at the fountain of knowledge. Others just gargle.
    1. Re:it's like that and that's the way it is by Woek · · Score: 1

      Thanks, that is a nice one!
      One thing still bothers me with this: What if the second envelope had equal content to the first the whole time, but it just flips depending on the way you slice it open? That way, you can never prove that there is some entanglement, the association was made when the envelopes were created, and the flip (or not) to opposite is made only with local information.

    2. Re:it's like that and that's the way it is by Anonymous Coward · · Score: 0

      Hidden variables can always explain all possible outcomes. Bell only showed that some types of hidden variables don't work. Whether you think that's definitive depends on how reasonable you find other kinds of hidden variables, compared to how reasonable you find non-local effects. The universe doesn't care how reasonable you find it, of course, and uses whatever mechanism it uses. We don't know what that is.

      There's no way the contents of the letters can predetermine the outcome. (i.e. No hidden variables can explain all the possible outcomes).

      Your example can be modelled using a hidden variable A that says "show X if opened left-to-right, show Y if opened right-to-left" and a hidden variable B that always shows X. Can you refine your example so it really can't be solved using hidden variables?

    3. Re:it's like that and that's the way it is by Bengie · · Score: 1

      Here's a funny thing I watched on the PBS Nova with a host that has a PHD and is a very active member of the quantum research community. I could have miss-understood something, maybe he was dumbing it down too much, or maybe this group was just plain wrong and it won't pass peer review.

      He was saying that recently, they have been doing tests where the used 3 photons, Photon A, B, and C. Photon A and B were entangled and quantum, then A was sent off a long ways away. Now, when one photon is entangled with another, when one of them is measured, it takes a random value and its entangled pair takes the opposite value. What they wanted to do was measure B to find out A, but that still doesn't allow you to communicate faster than light because the results are random.

      This is where his claim gets strange. Photon C is already measured, so it they already know its value, they can even manufacture C to have whatever value they want. Then they entangle C with B. Because C is already measured, B immediately takes on the opposite value of C, but because B is still entangled with A, A then takes on the opposite value of B, which is what C is.. well was. This process destroys the value of C and effective makes it random, but now A has the value of C, which was known ahead of time. The one "get you" is that you can't "copy" the information without destroying the original. In his summary, he did claim it was faster than light.

      They claim that this is hard, but they've been working on it and are working with another team somewhere else to recreate this.

      Again, need to wait for peer-reviews and have this duplicated by others, but it sure sounded interesting.

    4. Re:it's like that and that's the way it is by Anonymous Coward · · Score: 1

      It sounds like you are describing the process of quantum teleportation, which lets you use an entangled pair to send the state of a third particle. If so, then that has been peer reviewed and experimentally tested for nearly 20 years now. The only problem is it doesn't send necessarily an exact copy of the particle C, but a randomly chosen transformation of C, which has to be undone at the destination to get the state of C back. In order to know what transformation to undo, you measure particle C after the interaction with the entangled pair in a way that tells you what transformation takes place, then you have to classically send instructions to the person with particle B, otherwise they would just get random garbage out that is essentially indistinguishable from nothing being sent. So while an aspect of it acts faster than light, it doesn't allow any practical use without the limited by speed of light part.

    5. Re:it's like that and that's the way it is by tendrousbeastie · · Score: 1

      How do you entangle one photon with another when at least one of those photons existed prior to the entanglement process?

    6. Re:it's like that and that's the way it is by goombah99 · · Score: 1

      Thanks, that is a nice one!
      One thing still bothers me with this: What if the second envelope had equal content to the first the whole time, but it just flips depending on the way you slice it open? That way, you can never prove that there is some entanglement, the association was made when the envelopes were created, and the flip (or not) to opposite is made only with local information.

      You prove this by delayed choice. You don't decide which envelope to open first till the envelops are far apart.

      --
      Some drink at the fountain of knowledge. Others just gargle.
    7. Re:it's like that and that's the way it is by goombah99 · · Score: 1

      Hidden variables can always explain all possible outcomes. Bell only showed that some types of hidden variables don't work. Whether you think that's definitive depends on how reasonable you find other kinds of hidden variables, compared to how reasonable you find non-local effects. The universe doesn't care how reasonable you find it, of course, and uses whatever mechanism it uses. We don't know what that is.

      Right. no Local Hidden varaibles

      There's no way the contents of the letters can predetermine the outcome. (i.e. No hidden variables can explain all the possible outcomes).

      Your example can be modelled using a hidden variable A that says "show X if opened left-to-right, show Y if opened right-to-left" and a hidden variable B that always shows X. Can you refine your example so it really can't be solved using hidden variables?

      Simple. I did not say which envelope I opened first. I can delay that choice till the envelops are well separated.

      I didn't say which envelope I opened first.

      --
      Some drink at the fountain of knowledge. Others just gargle.
    8. Re:it's like that and that's the way it is by Requiem18th · · Score: 1

      Explain me again why hidden variables are ruled out.

      --
      But... the future refused to change.
    9. Re:it's like that and that's the way it is by goombah99 · · Score: 1

      Explain me again why hidden variables are ruled out.

      because slice left-to-right rules out seeing X-Y from happening. Local hidden variables (i.e. it was X all along) can't create that ourcome (GLobal hidden variables due but these require spooky action at a distance to change B based on A's letter).

      Finally you can't have letter A changing it's state in response to the slice as a local variable explanation, because, I have a free choice if I open letter A first (and thus determine B's outcome) or I open letter B first and thus determine letter A's outcome. Without global hidden variables A cannot know if B was opened yet or not.

      Thus with local hidden vraibles seeing X-Y on a left to right slice would eventually have to happen. It doesn't.

      --
      Some drink at the fountain of knowledge. Others just gargle.
    10. Re:it's like that and that's the way it is by Requiem18th · · Score: 1

      slice left-to-right? You are not making this easier...

      --
      But... the future refused to change.
  31. then what makes you qualified... by globaljustin · · Score: 1

    to speak on this topic if you don't have experience as an admin or teaching professor or researcher?

    have you been a lab tech for 10 years?

    either you are some kind of prof., be it adjunct, post-doc, research only, teaching, admin, etc or you've just been spitballing bullshit about academia this whole time from your imagination

    either way...you just backtracked completely then tried to make a deformed version of the point you were trying to make before...

    --
    Thank you Dave Raggett
    1. Re:then what makes you qualified... by Anonymous Coward · · Score: 0

      Not the same AC, but with a response like that you make it look like you have little to no connection to academia yourself (at least in US, apologies if you are trying to speak of universities elsewhere that may do things differently). Of the people you list, only adjuncts have the professor title, and maybe admins if by which you mean professors that also sit on committees or are in something like a chair position. There are large numbers of instructors at US universities that are not professors, and only have a term to term contract with minimal pay. Post-docs aren't even close, treated like better paid graduate students. Research universities also have staffs with "research scientists" which are not tenure track, not teach positions, and not called professors or even faculty, but it is a long term position that employs them for decades on longer projects, not to mention engineering staff which can sometimes blur the line with the scientist staff depending on if they write papers or not.

    2. Re:then what makes you qualified... by Anonymous Coward · · Score: 0

      Original AC: Yes, research scientist is the position I've held for some time now. I've taught in the past, but the non-faculty teaching positions have abysmal pay and the experience was hardly worth the time due to limits on curriculum for that particular program. I still end up interacting with plenty of students, whether graduate students on the clock, or other more worthwhile volunteer education programs. For a minimal loss of money, not having to worry about paperwork and interacting with students not worrying about grades is much more worthwhile.

      But this has drifted majorly off-topic, and with nowhere interesting to go.

  32. Another way to think about QM and Waves by goombah99 · · Score: 4, Interesting

    Something that's a little bothersome is that when you are designing a video game that portrays a classical world, the physical limits of the computer end up imposing many of the physical laws we are used to.

    for example, consider diffraction limited resolution. Basically the further away something is, the less resolved it becomes. The bigger the eye or telescope you look through the more you can resolve at a distance. In the real world we call this diffraction limited resolution. In a computer game we call it pixels, and the bigger the monitor (in pixels) the better the resolution.

    To object oriented variables cannot simultaneously know each other's state. One of them has to be updated first. There's a finite limit on how fast the computer can alter the memory locations and it can't change both at the same time. So there's a kind of speed of light limit on how fast the world can change. If were doing this on distributed architectures or iterating serially over the objects then that limit actually shows up in the connectivity of objects with distance: nearer objects can influence each other sooner than remote objects.

    Finally, there is an exception to that rule. Two objects can communicate instantly if they share the same class variables. This is spooky action at a distance. While it's often claimed that quantum mechanics does not allow hidden variable theories , this is a mis-interpretation of Bell's theorem. In fact it only disallows local hidden variable theories. Global hidden variable theories are what QM says do exist. That's exactly how you get entanglement.

    So QM emerges because of the class variables, diffraction emerges because of memory limits and the speed of light comes out from serial processing at the CPU or memory access level.

    Thus you can't actually create a simmulation of reality that didn't have the characteristics of our weird world even if you wanted to.

    --
    Some drink at the fountain of knowledge. Others just gargle.
    1. Re:Another way to think about QM and Waves by tonywestonuk · · Score: 2

      I have noticed this also.... For example, how would a programmer of a games physics engine, allow particles within that engine to move at any velocity. A computer only has a finite amount of power, its really difficult to make a particle move through infinite space, if it is going to have to render that particle at every position as it travels along.
      What happens if the particle's speed approaches that of the limits of the computers CPU. Dont want to end up skipping frames.... Well, one way would be to slow down the time perceived by that particle. this way the computer wouldn't have to spend as much time rendering it. Of course this might mean there are side effects, like time dilation, but the alternative would be things just disappearing at position a, reappearing at position b some distance later, which wouldn't be indicative of a crap physics engine. And, well, the particle isn't gonna know, its not like its got its own 'clock'...its just a particle.

    2. Re:Another way to think about QM and Waves by gl4ss · · Score: 3, Insightful

      there's no speed limit when the next frame is calculated based on the last frame into a new dataset, making reactions happen simultaneously for all purposes(heck, since it's just a simulaton you can do things like make the current frame to be affected by something that would happen in the future, because you can calculate that it would happen). when reviewing the output things happen at the same time.

      and that's why it's a "simulation"!

      --
      world was created 5 seconds before this post as it is.
    3. Re:Another way to think about QM and Waves by Anonymous Coward · · Score: 0

      I thought part of quantum mechanics was that when you get that small sometimes things DO just jump from A to B ignoring barriers in-between?

    4. Re:Another way to think about QM and Waves by Anonymous Coward · · Score: 0

      For the love of God someone mod this guy up.

    5. Re:Another way to think about QM and Waves by Anonymous Coward · · Score: 0

      There's relatively little a computer cannot do, that mathematics can.

      Simulating a single particle moving in an infinite universe? It's just a simple formula! It's a special case, so no problem at all! You can get the position and speed for any given point in time easily.

      The problems arise when you have 3 bodies or more. This problem has less to do with computer limitations, and more to do with limitations on the practicality of our mathematics, which has no easy solutions to this.

      Another common problem of simulation is concerning the time delta. Since mathematics denies us answers to complex problems down to infinite limits, people usually resolve this by calculating in steps. The smaller the step, the more in-line with the model your simulation becomes. However, even the smallest error will magnify over time and become huge errors. We have currently no way to avoid mathematical deterministic chaos artifacts in such simulations, but try to resolve this by using as small increments as possible. This can make calculations take days, months or years, but is necessary in order to ie. simulate super-novas for research.

    6. Re:Another way to think about QM and Waves by hawkinspeter · · Score: 1

      Interesting, but can you use that idea to make predictions? It'd be cool if you could derive certain constants from how computable a simulation would be.

      --
      You're a temporary arrangement of matter sliding towards oblivion in a cold, uncaring universe
    7. Re:Another way to think about QM and Waves by Requiem18th · · Score: 1

      I've never understood why they rule out hidden variables. Hidden variables are *hidden* how can you rule them out? I'm not a particle physicist but I'm sure there is no such thing as entanglement, it must be just an illusion.

      --
      But... the future refused to change.
  33. listen to Feynman then... by globaljustin · · Score: 1

    I know I'm exhibiting the same passive/aggressive pissing-contest bullshit I have been deploring when I do this....but how about let's settle down a bit? let's find some 'middle ground'

    (doesn't that sound like what a dept. chair says right before 'budget cuts' are announced?)

    to the myriad AC's who are apparently employed in academia, YES I sympathize greatly with the plight of how faculty are treated. Very much so in fact.

    i'm not going to list my resume...but I've been an adjunct & worked on post-doc projects in weird arrangements, and taught college classes as a contract staff and as a TA being misused....

    I think we are all on the same side here...but somehow somewhere an AC took a part of a comment of mine and ran with it

    I'd really appreciate some discussion about TFA in relation to layman's terms...

    We could start by discussing how Feynman himself said that a scientist doesn't "know" something unless they can explain it to an upper-level undergrad majoring in the field of the specific piece of challenging theory.

    That's not exactly "layman" but I'd venture to say the general /. reader is either a college graduate or self-taught to that approximate level.

    --
    Thank you Dave Raggett
  34. it is even more weirder than that (NO FTL!) by Anonymous Coward · · Score: 0

    there is no faster than light communication between the two particules. They are entangled and form a *single* system. In other word it is not particle A any,opre or particle B anymore but a system composed of partcile A and B. When you interract with the particle you are interracting with the whole system. You are NOT interracting with particle A and then changing particle B. You are interracting with the system composed of both. There is no FTL communication ! What goes against our common sense (like a lot of stuff in QM) is that two particle so far away from each other actually compose a single system.

  35. "Mysterious" == "I don't understand" by Anonymous Coward · · Score: 0

    I think it is safe to assume that if someone describes quantum mechanics as "mysterious", most of their knowledge of quantum physics comes from youtube videos, not contemporary science.

    In other words, it is most likely a reasoning analogical to this: "There is a mysterious connection between two separated bodies called gravitation. I wonder whether it's the same force that causes men to be attracted to women."

    Just because you use the same words (e.g. "attraction" or "connection") it does not make it the same thing.

    1. Re:"Mysterious" == "I don't understand" by Bengie · · Score: 1

      Gravity is mysterious. We have never directly observed it, only indirectly by its influence on everything around it.

  36. Is there anything actually real to any of this ??? by Anonymous Coward · · Score: 0

    Or is all just mental masturbation paid for by grant money and dimwitted/gullible rich people ??

    Any proof that 'quantum particles (whatever they are) have been manipulated -- first to read their state and then to 'move' them to check that they were 'entangled' ?? How about actually changing a quantum state of one of these so called 'particles' ???

    All theory?? (no more reality than instead of 'strings' its really treenie tiny purring cats (who can do exactly the same things and satisfy anll the same requirements -- but maybe with more likelihood??)

    Wormholes ? Yeaaaaah........ OK ....... More MM keeping various charlatans in sushi....

  37. Beliefs by Anonymous Coward · · Score: 0

    How many of the people who believe in this stuff call religion 'fantasy' ???

  38. Split Infinity by Tekoneiric · · Score: 1

    Quantum entangle a particle and a black hole so you can play spin the black hole.

    --
    *It's not what you can do for the Dark Side but what the Dark Side can do for you!*
  39. Heisenberg's horror by TapeCutter · · Score: 1
    --
    And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
    1. Re:Heisenberg's horror by hawkinspeter · · Score: 1

      That's a great link, funny and insightful at the same time.

      --
      You're a temporary arrangement of matter sliding towards oblivion in a cold, uncaring universe
  40. Wombles? by residents_parking · · Score: 1

    Am I the only one that misread the summary?

  41. Wormholes may explain entanglement. by master_p · · Score: 1

    If two entangled particles are connected with a wormhole, then it makes total sense that the state of one affects the state of the other, because if these two points in spacetime are connected via a wormhole, then communication between them is instant.

  42. A New Zelda Game!? by gameboyhippo · · Score: 1

    I thought the title was suggesting a new Zelda game before I reread it. "The Legend of Zelda: A Link Between Wormholes"

  43. Yes but... by DarthVain · · Score: 1

    Are we talking Star Trek wormhole, or Stargate wormhole, or Farscape wormhole...

  44. Wow. by spyke252 · · Score: 2

    The insight could help physicists reconcile quantum mechanics and Einstein's general theory of relativity

    What? QM is COMPLETELY in line with relativity. If you had FTL communication, it wouldn't, but that doesn't exist- quantum teleportation requires a classical channel to relay information (namely, which state Bob's particle collapsed into). I admit I haven't read the linked articles yet, but I doubt the authors made any such claim (and that was input by the submitter/editor)

    Source: I am a PhD student in Quantum Computer Science.

  45. Black holes? by Anonymous Coward · · Score: 0

    Wormholes are not connections between black holes. That's just SciFi bullshit. Why does /. have an article from an author who doesn't know the difference?

  46. Magnetic Portals Do Exist by Anonymous Coward · · Score: 0

    I can't believe SLASHDOT hasn't covered this yet!! ( sorry that this is a little off topic, but it's backed by empirical evidence)

    Magnetic portals are not wormholes but the do exist. They are difficult to detect. They extend from Earth to somewhere near the sun.

    Space portals are created between the sun and its affect on the Earth's magnetic field. They at vortecis of magnetic tunnels composed of outer space (Vaccuum space) on the inside of them and chaotic outer space blasted with solar wind energy from the sun.

    There are man made portals creating engines called VAZIMIR engines that create a magnetic tunnel thru which hot hot ignited Argon gas passes thru. The inventor of this engine, former astronaut Chang Diaz, claimed that this tech can get us to Mars in 39 days!