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Breakthrough Brings Star Trek Transporter Closer

japerr writes to mention The Independant is reporting that a new breakthrough may bring scientists one step closer to a Star Trek style transporter. " A team of physicists has teleported data over a distance of 89 miles from the Canary Island of La Palma to the neighbouring island of Tenerife, which is 10 times further than the previous attempt at teleportation through free space. The scientists did it by exploiting the "spooky" and virtually unfathomable field of quantum entanglement - when the state of matter rather than matter itself is sent from one place to another. Tiny packets or particles of light, photons, were used to teleport information between telescopes on the two islands. The photons did it by quantum entanglement and scientists hope it will form the basis of a way of sending encrypted data."

95 of 503 comments (clear)

  1. Bad Summary by Zenaku · · Score: 5, Funny

    It is true that "Star Trek style Transporters" are used to send Data, but it is with a capital "D" and they can send other crew members too.

    Misleading summary. Minus 100 points.

    --
    If fate makes you a motorcycle, you become a motorcycle.
    1. Re:Bad Summary by RealGrouchy · · Score: 5, Funny

      It is true that "Star Trek style Transporters" are used to send Data

      He woke up the next day and told Geordi he didn't think he'd be able to go to the holodeck.

      "Sorry, but I woke up feeling really encrypted"

      - RG>
      --
      Hey pal, this isn't a pleasantforest, so don't waste my time with pleasantries!
    2. Re:Bad Summary by Tablizer · · Score: 5, Funny

      [Data:] "Sorry, but I woke up feeling really encrypted"

      Explains why Data had the urge to write Perl ;-)

      -1 Troll

    3. Re:Bad Summary by Viraptor · · Score: 5, Funny

      Data: Cpt., I feel encrypted by that last teleportation...
      Cpt.: What do you mean?
      Data: All my video data has been modified... and there is a number burned in my mind... it's 09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0.

    4. Re:Bad Summary by thre5her · · Score: 4, Insightful

      Data doesn't use contractions.

    5. Re:Bad Summary by big_oaf · · Score: 5, Informative

      Sorry to nit, but since we are flexing our geek muscles here (the only muscles I have), Data has actually used contractions on occasion. According to Memory Alpha, "...Data also had trouble using contractions in regular speech although this was part of his programming by Dr. Soong." So apparently, it was possible for Data to use contractions, but not without difficulty and, therefore, rarity.

      --
      -- My hovercraft is full of eels.
    6. Re:Bad Summary by revengebomber · · Score: 5, Funny

      That wasn't informative. Everyone on slashdot already knows that.

      --
      09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0
      45 5F E1 04 22 CA 29 C4 93 3F 95 05 2B 79 2A B2
  2. Teleport? by jshriverWVU · · Score: 4, Insightful

    This sounds like a new form of fiber optics rather than teleportation. No item was physically disassembled and reassembled in another place. Rather they used telescopes to focus light. Perhaps I misinterpreted the article.

    1. Re:Teleport? by Tablizer · · Score: 5, Funny

      This sounds like a new form of fiber optics rather than teleportation. No item was physically disassembled and reassembled in another place.

      In other words:

      No red-shirted crewman were harmed in this experiment.

    2. Re:Teleport? by brunascle · · Score: 4, Informative

      you missed the part about quantum entanglement, which is not simply fiber optics. Niels Bohr is rolling in his grave right now.

    3. Re:Teleport? by nelsonal · · Score: 5, Funny

      Wouldn't he only be rolling in his grave if you try to observe him?

      --
      Degaussing scares the bad magnetism out of the monitor and fills it with good karma.
    4. Re:Teleport? by UnHolier+than+ever · · Score: 3, Informative

      It is teleportation of information, not of matter. We scientists define teleportaion as "moving something between point A and point B without ever being in between", which is different from the Star Trek "transforming matter in energy and into matter again". It does get us a whole lot more funding than if we had called it something unfashionable like "Communication through entanglement".

      By the way, IAAT (I am a teleporter). I don't get to work work in the Canaries though. It's a shame.

    5. Re:Teleport? by Lockejaw · · Score: 4, Funny

      He'd be spinning both clockwise and counterclockwise until you observe him.

      --
      (IANAL)
    6. Re:Teleport? by LoveGoblin · · Score: 5, Funny

      Hah. I read that as "No red-shifted crewman were harmed" and thought "Well, they would be moving pretty fast..."

    7. Re:Teleport? by sabernet · · Score: 4, Funny

      mod up. by the way, is the cat dead or alive? Yes, I believe it is. But I'm not certain.
    8. Re:Teleport? by dave420 · · Score: 4, Funny

      I have a quantumly-entangled scale model of him on my desk, and it's rolling like a bastard right now. Just knocked my coffee into the middle of next week. But that's a different problem all together.

  3. Accurate headline? by Verteiron · · Score: 4, Insightful

    From TFA, this sounds less like teleportation and more like another extension to the distance quantum cryptography has been successfully sent.

    --
    End of lesson. You may press the button.
  4. spooky? by Lord+Ender · · Score: 2

    The only thing spooky about this article is that the editors think data transmission and matter transmission are in any way related.

    --
    A slashdotter who didn't build his own computer is like a Jedi who didn't build his own lightsaber.
    1. Re:spooky? by brunascle · · Score: 4, Interesting

      ugh. how are they not related? what is matter? how could you possibly distinguish 1 photon from another with equal properties? you cant. there is no difference.

      and "spooky" is a reference to Einstein's phrase "spooky action at a distance"

    2. Re:spooky? by freakmn · · Score: 2, Interesting

      That relation is mentioned in the fine article as the headline, so it's not the fault of the Slashdot editors. It does seem that it's more of an encryption method than anything after reading the content of the article.

      On that note, I think that encryption of a transmission of matter in data form is extremely important. Can you imagine what an intercepted transmission of that nature would do? It would bring an entirely new meaning to identity theft. What about in a war situation, if the leader of the enemy was intercepted, and there was an extra copy of him, with memories intact, that was captured? It would change much more than you'd see on the face of it.

      All in all, I think that it's not directly related to a transporter, but it could be used if one were invented. It really is not the best title.

      --
      warning: This post is likely to contain gobs of dripping sarcasm. Consume at your own risk.
    3. Re:spooky? by numbski · · Score: 4, Interesting

      How are they NOT related?

      Let's put it this way - there are two sects in the field of teleportation that I'm aware of right now.

      Sect 1 defines teleportation as the tearing down of matter, converting it into energy, transport that energy, and convert it back into matter.

      Sect 2 defines teleportation as scanning all of the information about an object, transport that INFORMATION to destination, create replica, then tear down the original.

      Star Trek subscribes to version 1, unless of course you're watching a very particular episode. :)

      Anyway, in both cases, you recall hearing the term "pattern buffer" in trek, right? In either case, you have to break Heisenberg's Law (Heisenberg compensator anyone?) about knowing the exact state and location of all particles that make up an object. You store that information, transmit it to the other site, and from that site you either reconstruct the original, or duplicate the original.

      The frightening thing is, I see this program in my head writing an XML document, with trees and braches going something like atom/particle/state, and gzip compress it, then transmit it over the fastest method available, decompress on the other side. Just add matter. :D

      Wow I'm sick. :P

      --

      Karma: Chameleon (mostly due to the fact that you come and go).

    4. Re:spooky? by Jerry+Coffin · · Score: 2, Insightful

      It does seem that it's more of an encryption method than anything after reading the content of the article.

      It's not really encryption either -- it's just a way of transmitting some information, and knowing whether anybody else has intercepted the transmission. The relationship to encryption is that it allows you to transmit a key and know that it wasn't intercepted during transmission. Obviously, you only use the key if it wasn't intercepted. If memory serves, it's not immune to a MITM attack though. This is why the free-air transmission means something -- it's much easier to put your agent in the middle of an optical fiber.

      In the absence of public-key cryptography, this would be a big deal, as key distribution has historically been a big problem in encryption. In the presence of public key cryptography, however, the practical significance is likely to be fairly limited. In theory, if the problems associated with PK algorithms turned out to be easier than expected, this could become a big thing again -- but I see little sign of major breakthroughs in factoring, finding logarithms in a finite field, etc. Some pretty serious mathematicians have pretty solid arguments that elliptical curve encryption is probably not even amenable to the types of algorithms used for factoring and finite field algorithms (the sieve-style algorithms only work if you can prove "smoothness" and nobody's done so for elliptical curves -- and there are some fairly solid-looking arguments that they're not smooth).

      --
      The universe is a figment of its own imagination.
    5. Re:spooky? by crakbone · · Score: 2, Funny

      Either way, I think we are now one stop closer to the Fax-a-Pizza

  5. Einsteins view at least by jshriverWVU · · Score: 4, Informative
    Albert Einstein described quantum entanglement as "spooky action at a distance" and it relies on the fact that two photons can be created in such a way that they behave as a single object, even if they are separated by large distances. In behaving in this way they are acting as a teleportation machine because any changes to one causes similar changes to the other.

    1. Re:Einsteins view at least by TwilightSentry · · Score: 4, Informative

      IANAphysicist, but from what I know about entanglement, the idea is as follows. Particles (photons, electrons, etc.) do not have some values (eg, spin, charge, etc.) defined until they are observed. The fun happens when you have a process which is guaranteed to produce two identical particles, but does not cause the attributes of those particles to take a value. You can separate the two particles, and when one is observed, you have a guarantee that the other will take the same values, even if there hasn't technically been enough time for information to flow from one particle to the other.

      You can't actually transmit information using entanglement. (From my even more limited understanding, in quantum teleportation, the entanglement is used to extract the quantum state of an object and store it in a photon, which is then sent somewhere else using something like fiber.) You don't control the state of the particle when you first observe it; it is completely random. If you actually change one particle, the two particles are said to "decohere" and are no longer entangled.

      Again, I'm just an interested amateur, so please correct me if I'm wrong.

      --
      How to enable garbage collection on a system without protected memory: #define malloc() ((void *) rand())
    2. Re:Einsteins view at least by adelord · · Score: 2, Informative

      "Poke one subatomic-particle and the other one instantly changes spin!" Grind away brother, it doesn't make it any less true.

      --
      Eugene Debs: "Money constitutes no proper basis of civilization"
  6. Call me dumb... by morgan_greywolf · · Score: 5, Insightful

    But it seems to me that 'transporting' data, whether or not using quantum entanglement, isn't quite the same thing as transporting matter and really brings us no close the 'transporter' technology as seen on Star Trek.

    We can already transport data through space without using quantum entanglement at all -- it's called radio.

    1. Re:Call me dumb... by RealGrouchy · · Score: 2, Funny

      But it seems to me that 'transporting' data, whether or not using quantum entanglement, isn't quite the same thing as transporting matter and really brings us no close the 'transporter' technology as seen on Star Trek.

      It's actually a far more advanced version of the Star Trek technology.

      Say, for example, that you are in orbit and someone on the surface wants to know what colour shirt a crewman is wearing.

      With the inefficient Star Trek model, you'd have to send the crewman down, wearing the shirt.

      With this data-teleportation model, you only have to send the message "The crewman is wearing a red shirt."

      Unfortunately, since he didn't actually go on an away mission, you'd have to find another way to kill him off.

      - RG>
      --
      Hey pal, this isn't a pleasantforest, so don't waste my time with pleasantries!
    2. Re:Call me dumb... by digitalderbs · · Score: 3, Funny

      Exactly right. The hurdle for teleportation is the conversion of data and energy into matter. In theory, a Star Trek starship could beam crew members over 250 years time using 802.11g. (assuming, of course that a average human being contains exactly 55.8 petabytes worth of data).

    3. Re:Call me dumb... by nine-times · · Score: 2, Insightful

      It seems like every couple weeks, someone else writes an article or reads on article on this sort of teleportation and posts it all over the Internet. "Omigawd, we are SOOOO close to having Star Trek transporters!!!"

      And then everyone has to explain, "No, we really aren't." This really doesn't bring us any closer to being able to break material objects down to nothing (effectively) and simultaneously rebuild them perfectly at a far-away location.

      Could we all just stop this now? This article doesn't have any significant depth or any clear/new information. Quantum entanglement has been know for a while, but (and I am not a physicist, but AFAIK) there's never been any way to use it to transmit data in a way that breaks the speed of light. That would be a discovery, but it still wouldn't be moving actual matter across distances. It wouldn't be deconstructing atoms, molecules, or whole organisms on one side and rebuilding them on the other. So please, no more stores about how "Star Trek transporters are just around the corner!"

    4. Re:Call me dumb... by khayman80 · · Score: 4, Interesting
      Actually, I recently wrote a paper on quantum teleportation, and I was surprised to find that teleporting a human being with current telecom equipment would take longer than the age of the universe.

      There are lots of other problems, though. First of all, they can't even teleport single photons yet. All they can do is teleport a single degree of freedom of a single photon, such as polarization or transverse spatial state. Secondly, scaling the teleportation process up to macroscopic objects would require isolating the object to be teleported from its environment in order to preserve quantum coherence. I imagine vacuum exposure would make this procedure uncomfortable for... you know... living things.

      It should be noted that quantum teleportation is not able to transfer matter or energy from transmitter to receiver. All the protocol can do is transfer the quantum state of a particle (or, in the future, groups of particles) from transmitter to receiver. That doesn't mean that humans can't be teleported, though; the receiver would simply keep a stock of raw materials such as carbon, hydrogen, calcium and oxygen atoms out of which to reconstruct the person.

      For the moment, quantum teleportation bears little resemblance to its sci-fi namesake. It's still useful for sending secure messages because of one bizarre property of teleportation: a teleported state can be sent between points A and B without ever existing between those points. It's also the best way to network quantum computers.

    5. Re:Call me dumb... by JeanPaulBob · · Score: 4, Funny

      Actually, I recently wrote a paper on quantum teleportation, and I was surprised to find that teleporting a human being with current telecom equipment would take longer than the age of the universe.

      Oh, I dunno. Six thousand years doesn't seem like that long to me.

    6. Re:Call me dumb... by autophile · · Score: 4, Insightful

      It should be noted that quantum teleportation is not able to transfer matter or energy from transmitter to receiver. All the protocol can do is transfer the quantum state of a particle (or, in the future, groups of particles) from transmitter to receiver. That doesn't mean that humans can't be teleported, though; the receiver would simply keep a stock of raw materials such as carbon, hydrogen, calcium and oxygen atoms out of which to reconstruct the person.

      Thanks, but no thanks.

      Proof:

      Scan yourself down to the most fundamental level (regardless of what that is), and build an exact duplicate without destroying the original. Press the start button on the duplicate, assuming instantaneous duplication and starting. Since the original's consciousness has maintained continuity in the original, even if the duplicate is an exact copy of the original's state, it cannot be continuous with the original's state because the duplicate exists at a different location and time. (I considered using "space-time locus", but it's difficult enough talking about this without resort to high-falutin' words :)

      Therefore, the "you" that existed prior to duplication is the "you" of the original, and not the "you" of the duplicate. "You" suddenly don't perceive two different realities, one from the POV of the original, and one from the POV of the duplicate.

      The conclusion is that if someone destroyes the original, "you" die. Really die. The duplicate may have all your memories and skills, and will think it is the original, but it is not.

      Really, the only way teleportation (or brain-to-computer transference) could work is if each individual part (for some definition of "part") were duplicated, placed in sync with the original, and then the original part destroyed. Since consciousness consists of the whole and not the parts (assuming we're not going to invoke the supernatural), the consciousness remains continuous with only one instantiation at any one time.

      I've given this some thought, since I hope to download in 2045 :)

      --Rob

      --
      Towards the Singularity.
    7. Re:Call me dumb... by khayman80 · · Score: 2, Interesting
      Actually, quantum teleportation destroys the original state in the act of teleporting it. This is required by the no-cloning theorem of quantum information.

      On the other hand, the rest of your post makes very little sense to me. As long as the teleportation process is carried out at sufficient resolution to capture all the relevant details of my consciousness, and I emerge on the receiver pad with all my memories and personality, I don't understand how it could be anything but successful. If you're referring to the psychological strain of instantly seeing a new room... maybe all teleporter rooms can look exactly the same, down to the smallest perceptible detail.

    8. Re:Call me dumb... by suv4x4 · · Score: 2, Interesting

      Really, the only way teleportation (or brain-to-computer transference) could work is if each individual part (for some definition of "part") were duplicated, placed in sync with the original, and then the original part destroyed. Since consciousness consists of the whole and not the parts (assuming we're not going to invoke the supernatural), the consciousness remains continuous with only one instantiation at any one time.

      Probably, but consider this: can you really prove your consciousness remains continuous every time, say, you go to sleep and wake up the next morning.

      The same paradox occurs: you think you are the same consciousness, but there's no way to know.

      People take enough risk to die already by using a much simpler transportation device, a car. Maybe this invention is distant enough in the future to allow for our values to change, and realize that in the big scheme of things, it doesn't matter if you're an instant and perfect copy of yourself, using "generic energy" for the process every time you go back from work.

      Of course not many people from today would accept such a destiny ("wake up, honey and get ready to die in the teleporter to work").

    9. Re:Call me dumb... by phozz+bare · · Score: 2, Insightful

      It makes no practical difference. Do you avoid death in your daily life? Why? If you knew that you could do something that would appear, from your perspective, to be exactly the same as really dying, but would leave a replica of you living from the perspective of others, would you do it?

    10. Re:Call me dumb... by Subacultcha · · Score: 2, Funny

      Okay, let's assume that for a moment. Will anyone actually give a shit? Well, there was one guy who cared, but he'd be gone by then. There's another guy who looks just like him, though, and he's totally cool with it.
    11. Re:Call me dumb... by m50d · · Score: 2, Insightful
      Since the original's consciousness has maintained continuity in the original, even if the duplicate is an exact copy of the original's state, it cannot be continuous with the original's state because the duplicate exists at a different location and time. (I considered using "space-time locus", but it's difficult enough talking about this without resort to high-falutin' words :)

      Do it while you're asleep. You go to sleep in a (wheeled) hospital bed in a room. Two of you wake up in two identical beds in another room. How can you tell which one's which?

      --
      I am trolling
    12. Re:Call me dumb... by deadweight · · Score: 2, Funny

      Didn't Dr. McCoy (Bones) have exactly this reservation about using the transporter?
      He wasn't sure if the original soul got transported along with the body.
      Capt Kirk: Hi there St. Peter! You may not know it, but I am a famous starship captain. You're not going to hold the green alien chick thing against me, are you?
      St. Peter - points to about 400 Capt. Kirks standing around - You again!

  7. more like ender's game... by XiX36 · · Score: 2, Interesting

    than star trek, sounds more like an ansible than a transporter, though i suppose that ender's game is not as well known as star trek.

    --
    Insert witty sig here.
  8. IANAP.... by retro128 · · Score: 3, Interesting

    and I don't understand quantum entanglement very well. So I was wondering - Is it possible that something like this can enable faster-than-light communications?

    --
    -R
    1. Re:IANAP.... by lilomar · · Score: 4, Informative
      No. At least, not according to this article in the last issue of Darkermatter.

      So could these entangled particles be used for superluminal communications? To achieve this we would need to create two or more identical (or cloned) particles and then separate them physically from each other. Then if we were to act on one of the particles, an observer of the second should be able to detect an effect. Then introducing a code (such as Morse Code) would mean we should be able to communicate at greater than the speed of light.

      Such a thing is unfortunately impossible. In 1982 physicists Bill Wootters, Wojciech H. Zurek and Dennis Dieks introduced the No Cloning Theorem. This theorem states that it is impossible to create an identical copy of an arbitrary unknown quantum state. As cloning is a requirement of using these entangled particles for superluminal communication, we have to rule this method out.
      --
      The creator of this post (Jacob Smith) hereby releases it, and all of his other posts, into the public domain.
    2. Re:IANAP.... by lilomar · · Score: 2, Informative

      Oops, my fault entirely for not reading what I was posting properly. Yes, essentially, what these people have done is what the article I linked to (published only a few weeks ago) said was impossible. That's science for ya.
      (of course, INAP either, so maybe I still have it wrong, stranger things have happened..)

      --
      The creator of this post (Jacob Smith) hereby releases it, and all of his other posts, into the public domain.
    3. Re:IANAP.... by khayman80 · · Score: 4, Interesting
      I am a physicist, and I don't understand the connection between the no-cloning theorem and using entanglement for FTL communication.

      Think of entanglement this way: you've got two particles, each of them in a superposition of two states (horizontal and vertical polarization, for example). The "spookiness" of entanglement lies in the fact that the particles are created in a state where (for example) they have to have opposite polarizations. Thus even though each particle is in a (literally unknowable) superposition of horizontal and vertical, when you measure the first particle and find that it's horizontally polarized, that automatically means that a measurement on the second particle will show that it's vertically polarized. This occurs even if the second measurement is made a millisecond after the first measurement, and the two particles are on opposite sides of the galaxy.

      At first glance, this is remarkable. At second glance, it's just conservation of momentum: say the two particles are created from another particle with angular momentum=0. Then the sum of the two angular momentums needs to be 0, so their polarizations must be opposite. The "spookiness" Einstein referred to lies in the fact that quantum mechanics says that both particles are literally horizontally AND vertically polarized, up until the point where the first one is "collapsed" onto horizontal (or vertical). Then all of a sudden the states of both particles are well defined, which occurs even if both particles are separated by a great distance. Einstein took this spookiness to mean that quantum mechanics must be incomplete (namely, that each particle DID have a well defined state that quantum mechanics simply can't describe), but 30 years later a physicist named Bell found a way to experimentally test the issue using "Bell inequalities". Quantum mechanics predicted the outcome of these experiments (google Aspect experiments in the 1980s) up to very high sigma values.

      The problem with using these correlations for superluminal correlations is that each measurement just gives you a random horizontal or vertical outcome. The only interesting facet of these measurements is that, when you meet up with the guy who has the other entangled particles (at sublight speed), you find that your answers correlate perfectly. This isn't useful for communication! The only way that it could be used for communication is if quantum mechanics has small nonlinear terms which would allow one party to "bias" his collapse preferentially onto horizontal or vertical. Unfortunately, decades of testing have shown that any nonlinearities in the Schrodinger or Dirac equations underlying quantum mechanics are very, VERY small.

      Bummer. On the other hand, FTL communication automatically implies backwards-in-time communication (and thus travel) so at least we don't have to worry so much about being killed by our own grandchildren.

    4. Re:IANAP.... by khayman80 · · Score: 2, Informative
      IAAP, and yes, you're reading it wrong. The no-cloning theorem says that you can't take state "A" (which you can't measure or know anything about) and send it through a copying machine which gives you "A" and "Copy of A". Actually, you can build a machine like this, but only for state "A". You couldn't use the same copying machine for another unknown state "B". Which makes it kind of useless as a copying machine; it would be like requiring a different xerox machine for each book or magazine article you wanted to copy.

      Now, that doesn't mean that you can't create multiple copies of the same known state. In fact physicists do this all the time to run experiments enough time to obtain statistically reliable results.

      But it's also not the same thing as entangled particles. Entangled particles are not identical, in fact most of the time they've got different qualities like polarization. I've got another post in this topic that I believe sums the issue up fairly concisely.

    5. Re:IANAP.... by khayman80 · · Score: 5, Informative
      Unfortunately, it's not easy to demonstrate that FTL communication implies backwards-in-time communication without using spacetime diagrams. I've done a little googling, and the best website I could find on this subject is here.

      The gist of the argument is that special relativity divides the universe into three regions of spacetime: the timelike future (which is the set of all points where you COULD be in the future if you could travel at any speed up to and including the speed of light), the timelike past (which is where all events that could POSSIBLY have an affect on you at the present reside) and "elsewhere", which is comprised of all other events. An example of an "elsewhere" event is the state of the Mars rovers RIGHT NOW. I can't possibly know that at the moment because there's about a 30 minute light travel time delay. It's important to realize that FTL communication connects you to an event in "elsewhere" in a causal manner.

      If you draw a spacetime diagram for two people, one of whom is moving very fast (at a conventional sublight speed) relative to the other, you'll find that the "elsewhere" of one observer intersects the past of the other. So using FTL communication and sublight engines to send a message to the past would work like this:

      1. Bob gets in his fancy spaceship and travels directly away from earth at 90% the speed of light. He travels for 1 year (the time and speed aren't really important, they just allow the message to be sent farther into the past).

      2. Alice, on earth, sends Bob an instantaneous message using her FTL communication device. It travels to Bob along what Alice considers to be her "line of simultaneous events" - the line in her spacetime diagram that goes through her present position and on through "elsewhere", to define the "present". It's not necessary for Alice's communication to be instantaneous, but it makes the argument (a little) clearer and doesn't really matter because going 1.0000001x the speed of light is just as impossible as going infinitely fast (as an instantaneous communication device would have to do).

      3. Bob receives the message at the exact instant (in Alice's timeframe) as when she sent it. He then sends the message back to Alice using the same FTL device. The difference is that Bob is travelling at 90% of the speed of light, so his "line of simultaneous events" is completely different- it actually intersects Alice's "timelike past".

      All of this makes a lot more sense once you get the hang of drawing spacetime diagrams, but it confused me for many years. You might want to google for tutorials on spacetime diagrams or "pole and barn" paradoxes to see some examples of spacetime diagrams...

  9. Useless for transporting matter by elrous0 · · Score: 2, Informative

    A lovely headline, but the only practical application of this form of "teleportation" is cryptography (you could have some pretty damn unbreakable keys with this). Even if you could "teleport" any significant amount of matter, it would be many, many, many orders of magnitude more challenging than this and you would have to get past some pretty significant hurdles (Heisenberg being one of the least of your problems).

    --
    SJW: Someone who has run out of real oppression, and has to fake it.
  10. Re:When the day come... by LWATCDR · · Score: 4, Funny

    I bet he would really hate that since he is still alive.

    --
    See my blog http://ilovecookes.blogspot.com/ for light hearted technical information.
  11. Re:Matter? Yeah, right. by ObjetDart · · Score: 3, Informative
    Have these guys who wrote the summary heard of the Heisenberg uncertainty principle? It was in all the papers.


    Sure they have. That's why all the Star Trek transporters employ "Heisenberg compensators". Duh.

    --
    I read Usenet for the articles.
  12. Re:When the day come... by Opportunist · · Score: 2, Funny

    Given the way he speaks, I find a 5 stage rocket more fitting.

    --
    We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
  13. Re:The "Independant"? by spun · · Score: 4, Funny

    They tried to teleport the name of the source directly into the summary and it got scrambled. Cut them some slack, it's a new technology.

    --
    - None can love freedom heartily, but good men; the rest love not freedom, but license. -- John Milton
  14. *Overheard in the lab* by DarthStrydre · · Score: 2, Funny

    LORA - Well, here goes nothing ...

    GIBBS - Hah. Interesting, interesting. You hear what you said? "Here goes nothing."

    LORA - Well, I meant -

    GIBBS - Whereas actually, what we propose to do is to turn something into nothing and back again. So you might just as well have said, "Here goes something and here comes nothing." Hah!

  15. Re:When the day come... by AttillaTheNun · · Score: 5, Funny

    I vote for beaming William Shatner into space now. Why wait for ashes?

  16. One step closer to an ansible, maybe. by tukkayoot · · Score: 4, Interesting

    The article says that quantum entanglement is one of the scientific principles invoked by Star Trek to explain how transporters function, and that may be true as I don't own all of the tech manuals, but my understanding is that the main principle behind transporter operation is the idea that matter-energy conversion is possible (and practical). Same goes for holodecks and replicators.

    What this would seem (at least on the surface) to bring us closer to is the ansible communications technology employed most famously in the Ender's Game series. That is, by utilizing the properties of quantum entanglement, it may be possible to achieve faster-than-light communication. This also has its problems though ... I've read some bits by physicists who claim that such technology is impossible or unlikely to ever be achieved, but I'll admit that I didn't really understand the first thing about their arguments.

    1. Re:One step closer to an ansible, maybe. by hal2814 · · Score: 3, Funny

      Seems like ansibles would be a bad idea. Sure you could have faster than light communications but at the expense of the Buggers hearing every word of it.

    2. Re:One step closer to an ansible, maybe. by UbuntuDupe · · Score: 4, Interesting

      My reaction was, it doesn't matter if you're limited to the speed of light, or if it can provide additional encryption. It still has the benefit that you can send data without using the (limited) electromagnetic spectrum, or laying down lines, both of which are expensive markets to enter.

    3. Re:One step closer to an ansible, maybe. by SEAL · · Score: 4, Funny

      It still has the benefit that you can send data without using the (limited) electromagnetic spectrum, or laying down lines, both of which are expensive markets to enter. ... because hiring a team of quantum physicists, securing patents, and avoiding becoming a wholly owned subsidiary of the NSA is so much cheaper?

    4. Re:One step closer to an ansible, maybe. by iluvcapra · · Score: 5, Funny

      my understanding is that the main principle behind transporter operation is the idea that matter-energy conversion is possible (and practical). Same goes for holodecks and replicators

      I own many of the technical manuals, and they go to pains to handwave over this part of it, making a big deal about "Heisenberg compensators" and working through how these machines capture the data (basically every quantum number in the system, in real time, digitally). All of the gear you mention usually has something called a "phase transition coil" that does the complicated job of making the matter non-corporeal. One can assume the mass is turned into energy, the books won't dissuade you from this, but mass into energy isn't a phase transition, and the amount of energy you'd get from the average human mass would destroy the Enterprise several times over.

      The likely explanation a writer, cornered, would give you is that these devices handle matter that is in an as-yet-undiscovered, highly exotic, highly energetic, wavelike, and protean phase of matter, that might as well be energy from our modern-day perspective. In the canon, an object being transported is never referred to as energy, but as "phased matter," which would seem to support this.

      Now if you'll excuse me, I'm going off to sleep with my highly exotic, highly energetic, and as-yet-undiscovered girlfriend.

      --
      Don't blame me, I voted for Baltar.
    5. Re:One step closer to an ansible, maybe. by moderatorrater · · Score: 3, Informative

      The ansible communicated by means of two entangled particles. That is impossible by everything that we currently know.

      The type of system they're talking about is where you use entangling to imprint the differences between two particles on a third one. They're fundamentally different and resemble neither the ansible nor star trek transporters.

    6. Re:One step closer to an ansible, maybe. by brunascle · · Score: 4, Informative

      by utilizing the properties of quantum entanglement, it may be possible to achieve faster-than-light communication
      no, it isnt. this has nothing to do with the speed of light. you cant use quantum entaglement to send data faster than light. no one is trying to.

      if you're trying to send data, you'll still need to send photons (or other particles) from one location to another. when you're talking about quantum entanglement and sending data across distances, what you're doing is taking two photons in the same location and tieing them together, then sending one of the particles across a distance. when it gets there, it's still tied together (unless something screwed it up on the way), but if you try to manipulate your photon then it unties from the other, so you cant use it to send info faster than light.
    7. Re:One step closer to an ansible, maybe. by brunascle · · Score: 4, Funny

      this is god speaking. stop looking for superluminal travel. it doesnt exist.

    8. Re:One step closer to an ansible, maybe. by ConceptJunkie · · Score: 5, Funny

      The good news is that you can send unbreakably encrypted messages over long distances instantaneously. The downside is that the people who receive your messages are complaining about President Kucinich's proposed tax legislation and how expensive produce is since California fell into the sea, and all the foreign aid we've given to Mexico because of it, and whether Quebec's Senator is eligible to be the U.S. President because when he was born, it _was_ a foreign country, and they have no idea what the hell your warning about terrorist activity at Kennedy airport is all about.

      --
      You are in a maze of twisty little passages, all alike.
    9. Re:One step closer to an ansible, maybe. by brunascle · · Score: 2, Interesting

      eh, not really, from what i understand. the grey area is in the definition of "affecting" the other particle. observing one doesnt really affect the other, in the normal sense of the word.

      one way people think of it is that, say there are an infinite amount of possible states for the particle. what there really is is an infinite amount of universes, and each universe has 1 particular state of the particle. and in each universe, the state of that particle matches the state of the particle it's entangled with.

      before observing the particle, all the universes blur together. when you observe your particle, it doesnt affect the other, it affects everything. all the universes except one disappear into nothingness. and, as before, it just so happens that in this universe that has become real, both the particles are tied together, so both of them now have a real single state that matches somehow, and not the blurring of infinite states as before.

    10. Re:One step closer to an ansible, maybe. by KingMotley · · Score: 2, Funny

      God, it's "doesn't".

    11. Re:One step closer to an ansible, maybe. by JesseMcDonald · · Score: 2, Informative

      some new, cheap source of energy (like, say, dilithium crystals)

      As I recall, the dilithium crystals were not the source of energy; they were merely there to regulate the matter-antimatter reaction. As far as I know the origin of the antimatter was never explained. Forget dilithium; if we had their (presumably unlimited) supply of antimatter, energy would become the least of our worries.

      --
      "The state is that great fiction by which everyone tries to live at the expense of everyone else." - Bastiat
    12. Re:One step closer to an ansible, maybe. by maxwell+demon · · Score: 2, Informative

      Interestingly it's not really hard to see that there's no superluminal information transfer. All you have to do is to look at the system in the Heisenberg picture. See http://arxiv.org/abs/quant-ph/9906007 for details.

      --
      The Tao of math: The numbers you can count are not the real numbers.
    13. Re:One step closer to an ansible, maybe. by Red+Flayer · · Score: 2, Informative

      but if you try to manipulate your photon then it unties from the other, so you cant use it to send info faster than light.
      Not so; the problem isn't that it untangles, it's that no useful data can be sent FTL. Sure, you can change the state of the particle, and the entangled particle will also change state. But you can't determine the meaning of the changed state unless you have a traditional (read: non-FTL) communication channel to compare results of your analysis.

      Patrick Van Esch explains it much better than I can:
      all things you can measure locally are determined by the LOCAL reduced density matrix, and this matrix doesn't change when one or another measurement is performed, or not, on the OTHER system. So locally, no result (average, probability....) changes. What DOES change is the correlations between the two subsystems, but you can only find that out when you bring the local measurements together through some classical information channel (a telephone, for instance).
      --
      "Trolls they were, but filled with the evil will of their master: a fell race..." -- J.R.R. Tolkien on Olog-hai
    14. Re:One step closer to an ansible, maybe. by brunascle · · Score: 2, Informative

      no, you actually have to send a photon. you can create entanglement at a distance. you create it locally, then send the photon.

    15. Re:One step closer to an ansible, maybe. by syousef · · Score: 2, Funny

      Now if you'll excuse me, I'm going off to sleep with my highly exotic, highly energetic, and as-yet-undiscovered girlfriend.

      The infamous undiscovered cun.....no I just can't do it

      --
      These posts express my own personal views, not those of my employer
    16. Re:One step closer to an ansible, maybe. by mcarp · · Score: 2, Informative

      Mo, you ARE sending photons. You have 3 photons involved. 1 and 2 which are entangled and seperated by a distance. 3 interacts with 1 then is transmitted to 2 and then interacts with 2 in a way which preserves the original entanglement plus the changes incurred through interaction with 3. Thus transmitting the changes of interacting with 3 from 1 to 2.

      You are still left with having to transmit photon #3.

    17. Re:One step closer to an ansible, maybe. by bh_doc · · Score: 5, Informative

      Wrong. Completely and utterly wrong. You can't send information faster than the speed of light.

      Quantum teleportation doesn't work like that. Here's basically how it works: Two quantum particles are entangled. Then they are separated from each other, one goes to point A the other to B. If you do a measurement on A and COMMUNICATE THE RESULT OF THAT MEASUREMENT to where B is. The other guy can do a special measurement on B based on what A's result was. Then the state of A becomes what the state of B was originally. The particles have not moved (the measurements have changed their states, though), but A's state has been "teleported" to B. It's all to do with the fact that the two particles were entangled in the first place.

      But the very important point is that you *still have communicate the result of the first measurement*, which means you're limited to the speed of light.

      There is still application for encryption since just knowing what the result of the measurement was is not enough without having the actual entangled particle B.

      BUT THERE IS NO APPLICATION TO STAR TREK-LIKE TELEPORTATION OR FASTER THAN LIGHT-SPEED COMMUNICATION. And frankly I'm getting tired of seeing the same wrong information getting played in the media like this. And slashdot even, come on guys, you should know better by now. I'm new here, aren't I?

      Yes, IAAQP.

    18. Re:One step closer to an ansible, maybe. by thesandtiger · · Score: 2, Funny

      This is Lord Kelvin speaking, and I agree: all that remains of physics is a few more decimal places.

      --
      Since I can't tell them apart, I treat all ACs as the same person.
    19. Re:One step closer to an ansible, maybe. by Hanzie · · Score: 3, Insightful

      The above post refers to a PARALLEL UNIVERSE, and is NOT making a political statement. SF writers have long used alternate political situations to show a parallel universe that is very similar to ours, but definetly different.

      The above post deserves to be moderated as +1 humor, since it is the first to bring up the idea of the quantum entanglement communications device accidentally talking to another universe.

      The above post is absolutely not flamebait.

      hanzie.

      --
      ********* sig: If you don't like the law, get filthy stinking rich, and buy a better one.
    20. Re:One step closer to an ansible, maybe. by brunascle · · Score: 2, Informative

      the state of the second particle doesnt change. period.

      there is 1 wave function. you're not observing one of the particles, you're collapsing the wave function.

      when you first entangled the two particles, you made it so that they both had to have the same property. and you sent one of the particles to your buddy. because you were careful about sending it, and making sure it didnt bump anything else, you know that they still have to have the same property. you dont know what that property is yet, because you havent looked. then, you look.

      this is exactly like taking two balls, a red and blue one. you mix them up and mail one to your buddy, without looking at either one. you know that if you look at yours and it's red, then your buddy's must be blue. but you havent looked yet.

      now stop. dont think ahead. the two situations are exactly the same. now move ahead, and everytime you find yourself wondering how the first particle affects the second, remember the red and blue balls.

  17. 'tis uncertain... by Namlak · · Score: 3, Funny

    Have these guys who wrote the summary heard of the Heisenberg uncertainty principle?

    Yes, but as soon as they heard of it, they couldn't locate it.

  18. Actual article title and author by Anonymous Coward · · Score: 2, Informative

    TFA mixed up both the author's name and the journal this work was published in. The author's real name is Rupert Ursin (not Robert), and the article was published in Nature Physics Online, not Nature Physics (those are separate journals). The article itself is available here as a pdf.

  19. Transporters won't ever happen by mbadolato · · Score: 2, Funny
    Perhaps it will some day be technologically possible, but it won't ever happen in reality. Scott Adams (Dilbert) said it perfectly:

    It would be great to be able to beam your molecules across space and then reassemble them. The only problem is that you have to trust your co-worker to operate the transporter. These are the same people who won't add paper to the photocopier or make a new pot of coffee after taking the last drop. I don't think they'll be double-checking the transporter coordinates. They'll be accidentally beaming people into walls, pets, and furniture. People will spend all their time apologizing for having inanimate objects protruding from parts of their bodies.

    'Pay no attention to the knickknacks; I got beamed into a hutch yesterday.'
    1. Re:Transporters won't ever happen by Bullet-Dodger · · Score: 2, Funny

      I teleported home one night
      With Ron and Sid and Meg.
      Ron stole Meggie's heart away
      And I got Sidney's leg.

      -Douglas Adams

  20. Re:nice summary... or something by scriptkiddie · · Score: 2, Informative
  21. Good News: We can dissassemble your body by WillAffleckUW · · Score: 2

    atom by atom, and send information on what component parts were and where they were located.

    Next we can put it back together.

    You'll still be dead, no longer a functioning biological biochemical organism which is in constant motion and has altering states of being at the nanosecond level, and you'll still have died in agony while we ripped your body apart.

    But now we can bury you on the other end!

    --
    -- Tigger warning: This post may contain tiggers! --
  22. Re:IndependEnt! by dreamchaser · · Score: 3, Funny

    You mean -1 Indepedantic, don't you?

  23. Re:The "Independant"? by MannyO · · Score: 2, Informative

    Well, a google search for "the independant" changes all the options to "independent" and http://theindependant.com/ looks like a news site but it's just a parked domain. So yeah, it may be a typo.

  24. Its all in the time travel... by javabandit · · Score: 3, Insightful

    First off, I've never slammed an article headline in all the time I've been here at Slashdot, but I'm doing it now. How in the hell is transmitting data even remotely a step in the direction of transmitting matter? Puhleeze. A step closer to teleporting matter would be to vaporize a small animal and then "shoot" the particles 89 miles away -- perhaps.

    Secondly, as others have posted, it ain't gonna happen. Teleporting matter by breaking it down and reconstructing it on the other end ain't going to happen. There are so many holes in that approach that its not funny.

    I read a couple of interesting magazine articles on teleportation, and the key to teleportation is really time travel. Teleportation would be sending someone on a time-ride, bending the space-time continuum, have them "arrive" at the exact physical destination but still in the same temporal location in which they left. That is the key. However, the big problem with this approach is that the matter being transported will still age the amount of time is took the "time ride" to occur. Still, any teleportation is a feat the will probably never be accomplished.

    But let me go on record as saying that rather than for science to focus focusing on teleportation or time travel seems moronic. How about we just focus on building some kind of high-speed passenger transport mechanism that travels at supersonic speeds (something like Mach 3 or Mach 4)?

    Personally, I'd be just fine if I could go from Los Angeles to New York in one hour. And that seems like a much more achievable goal.

  25. Philosophical Questions by jjohnson · · Score: 2, Informative

    Derek Parfit is an interesting philosopher who's done a lot of work on personal identity just by examining various Star Trek transporter scenarios (like what if you're reconstructed at the other end but don't disappear at the start).

    --
    Anyone who loves or hates any language, platform, or manufacturer, doesn't know what they're talking about.
  26. whats the big deal? by Virgil+Tibbs · · Score: 2, Funny

    whats the big deal?
    at the moment all it seems they have done is transmitted data(with small d). We have been able to do that since morse code... Can somebody explain to me what the big deal is becasue apart from the ultimate aim, I'm failing to see how this is a breakthrough.

    --
    www.tdobson.net #### Dare to Dream #### blog.tdobson.net
  27. title is total crap by DragonTHC · · Score: 2, Insightful

    they used telescopes to form a fibre link.

    they didn't teleport anything.

    they used a giant remote control.

    --
    They're using their grammar skills there.
  28. Stephen Hawking says... by purpleraison · · Score: 3, Interesting

    I was reading one of Dr. Hawkings writings, and he specifically addressed this issue, and described very nicely what some of the possibilities were, should this kind of technology ever become reality.

    One of the interesting ideas is that since you would have every possible particle of information about an object, or person -- that you would not only be able to transport things, but also duplicate them much in the same fashion that a computer can copy and duplicate files.

    Spooky..

    --
    I am open source, and Linux baby!
  29. Give me data, not matter by Macka · · Score: 2, Interesting


    Why does everyone get so hung up with transportation of matter, when data is so much more exciting and more relevant to the world we live in.

    What I want to see is the first two-way transmitter/receiver that works via quantum entanglement. Instant communication over any distance!

    Just imagine the possibilities -- real time communication with probes throughout the solar system, or even further. Eventually it might be possible to have a mobile phone that works anywhere in the world, without the need for a satellite network and with no signal blind spots. Countries could increase their backbone bandwidth without the need for more fibre cables. TV and Music could be broadcast from anywhere, to anywhere in real time. I'm sure you can think of hundreds of other applications for this.

    1. Re:Give me data, not matter by ErikZ · · Score: 3, Funny

      Instantaneous spam. All over the universe.

      --
      Democrats or Republicans. They are both taking us to the same place and they are not afraid of us anymore.
  30. Re:Dear Slashdot by AMSRay · · Score: 5, Funny

    That wouldn't do you much good if you were 89 miles away from where your penis went.

  31. Re:Dear Slashdot by stonedcat · · Score: 5, Funny

    It sure would freak her the hell out though.

    --
    You can't take the sky from me.
  32. Nah, he's dead Jim! by freaker_TuC · · Score: 4, Funny

    mod up. by the way, is the cat dead or alive? He's dead Jim, but not as we know it!
    --
    --- I am known for the ones who want to find me on the net. Is that a privacy risk or a privilege? One might wonder..
  33. Correction by Anonymous Coward · · Score: 2, Informative

    >> You can't send information faster than the speed of light.

    Correction: You can't send information faster than the speed of light in current models.

    Science is about devising consistent mathematical models, using them to create hypotheses that should be observable in reality, and then determining the degree of correlation between the prediction and the observed behaviour of reality. If the correlation is good then the model is considered useful. That's it, that's all there is to the scientific method.

    Our current scientific models say that you can't send information faster than the speed of light, and that's an inescapable property of these models, built into their mathematical basis, but it is not a property of reality herself. We have no means of knowing what reality will or will not permit. We'll need to devise new models in order to test deeper properties, as it's beyond the capability of current models.

    Don't confuse models with reality, nor properties of models with properties of reality. The two are quite distinct.

  34. Ascii Diagrams! by GeneJoker · · Score: 2, Informative

    The above explained crudely and innacurately using ascii diagrams.

    X and Y are at the same location. It is 9 o'clock

                                    XY
                                      9

    X has a sudden, irresistable urge to get as far away from Y as possible. He departs rapidly to the left at Mystery Speed(tm)
                            X {- Y
    Y's Tale

    Y stands around for an hour, at which point she feels needy and clingy and rings him with her Nifty Ansible(tm). Her watch says it is 10 o'clock.
    Now, from Y's perspective, X has been travelling so fast to the left that he has reached relativistic speeds. As such, only half as much time has passed for him. His watch says it is 9:30.

                    X {- Y
                    9:30 10

    He gets a phonecall. Y says "I miss you I need you come back (bring me a magazine)"
    He replies "Fine." and hangs up.

    X's Tale.

    X realise he didn't know which of the seventy million identical celebrity magazines Y wanted. But from X's perspective, /Y/ has been traveling rapidly to the /right/. As such, only half of half an hour has passed for her, and her watch says 9:15.

                    X -} Y
                    9:30 9:15

    She gets a phonecall. X says "What magazine do you want?". Y says "OMG YAY YOU WERE THINKING OF ME a people would be nice."

    Y, having gotten the reply 45 minutes before she sent the initial call, thinks X called off his own bat. She feels happy and validated, and does not ring him 45 minutes later. So he never calls her. So she feels lonely and calls him. So he calls. So she doesn't. So he doesn't. Then the universe explodes.

                    X BOOM Y

    And that's why relativity and relationships don't mix.

  35. Re:The "Independant"? by dosquatch · · Score: 2, Funny

    "Independant" is an infact

    infact; v; 1. to agressively attack with facts and/or information 2. the state of being so set upon ("I'm infacting as hard as I can, Captain!", "Help! Help! I'm being infacted!") n; any implement used in the execution of such
    See also "LART", "clueing"

    I'm not so sure that "Independant" is an infact, but it makes my head hurt so you may be right.

    --
    "Hey, the third matrix movie would have been good except for the plot,story, and acting." --AC