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Quantum Entanglement of Macroscopic Diamonds
New submitter ananyo writes "A pair of diamond crystals has been linked by quantum entanglement — one of the first times that objects visible to the naked eye have been placed in a connected quantum state. 'This means that a vibration in the crystals could not be meaningfully assigned to one or other of them: both crystals were simultaneously vibrating and not vibrating (abstract). Quantum entanglement — interdependence of quantum states between particles not in physical contact — has been well established between quantum particles such as atoms at ultra-cold temperatures. But like most quantum effects, it doesn't tend to survive either at room temperature or in objects large enough to see with the naked eye.'"
this both gives me the chills, and doesn't.
great..... we dump all this money in some eggheads' laps, and all they can think of is to make fancy adult toys
This is a first post, and yet it isn't!
so..... the two crystals each have atomic particles sharing the same nucleus or something?
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Both are the same thing, which is infinite.
Time and space are illusions*. Try to prove them and you will only produce paradoxes.
* lunch time, doubly so.
"Flyin' in just a sweet place,
Never been known to fail..."
should be an experiment with a cat & some poison
They say that each phonon involves the coherent vibration of about 1016 atoms, corresponding to a region of the crystal about 0.05 millimetres wide and 0.25 millimetres long â" large enough to see with the naked eye.
0.05 mm is roughly 1/4 the width of a human hair. Of course, I still can't see it, because it's just a patch of vibrations on a much larger diamond.
Neat... Now I can get a pair of diamond vibrators and please both my wife and mistress at the same time!
As near as I can understand this they're entangled so that vibrations in one are indistinguishable from vibrations in another, they both do the same thing at the same time (or near it at least)... doesn't this imply the ability to entangle two whatevers and transit information via entanglement induced vibrations?
A bullet may have your name on it but splash damage is addressed "To whom it may concern."
Next up, control a Mars rover in real-time.
When can we have a perfectly secure, instantaneous communicator that even works across universes and can be carried by tiny humanoids?
Hyperbole: I use it liberally!
Entangled diamond jewelry -- how else can you demonstrate the superposition of your commitment to your one true love? (For 10 picoseconds.)
Ansibles are mere steps away.
Does this mean my wife could have a diamond of twice the size, until she looks at it?
Diamonds are a scientist's beeeest frieeeeend!
Problem is, if someone actually saw them the experiment wouldn't work.
Did you actually read the article? "Cheap words" make up all science and literature. They explained everything they did in the article. Or do you expect them to post all their experimental data on this brief web article?
"When we detect the Stokes photon we know we have created a phonon, but we can't know even in principle in which diamond it now resides," says Walmsley. "This is the entangled state, for which neither the statement 'this diamond is vibrating' nor 'this diamond is not vibrating' is true."
To verify that the state has been made, the researchers fire a second laser pulse into the two crystals to 'read out' the phonon, from which the laser photon draws extra energy.
Simultaneously are and are not a girl's best friend.
You're correct. As of the 2007, the Scientists Guild requires all scientific evidence to be accompanied by visible light videos for stringent pixel examination. And, looking at a 2009 amendment, two viewpoints are required if the entire scene is many times smaller than a wavelength of the color orange, as it most likely is here.
"The optical properties of diamond make it ideal for producing tiny optical circuits on chips." what does that have to do with quantum states.... or am i missing something.
Will someone explain to me again why must we consider two "superimposed" states, that "both" occurred, until we measure one of the two?
Why can't we just say that we don't know which of the two states happened until we measure it? Why all the ambiguity??
Now let's give one diamond to my ISP, and one to me, and maybe I can get some information at a decent speed.
Sounds like you're missing the actual science education.
As far as I understand, the key is that the photon (and phonon) leave everything as it was. If the photon (or the phonon) somehow changed the state of the diamond crystal, the entanglement couldn't take place.
So I can suggest an even more mundane example of "Schrödinger's cat:" light traveling through the air. A photon leaves the lightbulb as a superposition of all directions (a ball wave) and interacts with the air molecules. But you can't tell which precise air molecules it "touches." No momentum or energy (or other quantum numbers) is transferred to them so the air is left intact by the photon. However, the interaction can be observed generally by the fact that the photon hits the screen "late."
What I find interesting is that light that is reflected off a mirror retains its quantum properties (interference). That means that a photon that is reflected back does not change the momentum of the mirror (measurably) because otherwise you could detect the change after the fact and determine the path taken by the photon.
Same plot
So Mitt Romney is living proof of quantum mechanics?
Let me try this one...
You have a T shaped tunnel. Car goes in at the bottom, the drivers gets instructions to pick left or right at random. On both sides of the tunnel exits, you put a large glass plate across the road. Now you send off the car. It's important that you don't look which exit the car takes, no peeking! After enough time has passed for the car to have exited the tunnel, one of the glass plates will be broken, the other not. The 2 glass plates are now in an entangled state, you do not know which one is broken and which not until you look, you just know one of them is broken.
According to TFA the difficulty with the experiment seems to be that most cars never exit the tunnel. They must be using mice for drivers.
but rather... spooky.
--
AL
Detecting wavefunction collapse is trivial, just look for interference between the possible states, ala the two-slit experiment. HOWEVER, if the collapse of an entangled wavefunction can be detected, than FTL information transmission is possible, because collapsing one half of an entangled pair will instantly collapse the other half, causing the interference pattern (or whatever) to disappear. So what am I missing?
...is for us to simulate quantum entanglement in a digital object.
We have done it with neural networks, we can do this.
It will be very difficult (possibly profitable too), but a truly epic breakthrough.
Think of it.
A pox on web designers who feel that window.innerWidth == screen.availWidth
I mean, what's not to like about them? So many uses!
Let us not lose sight of the fact that a photon is a statistical convenience, not a particle, and a phonon is even less a particle. You can't send "one photon" and detect "one phonon". These are statistical coincidence measurements that detect correlated behavior between the two diamonds after an electromagnetic interaction that can not transfer less than Planck's constant of action. Either diamond would show a 50% excitation in the absence of the signal from the other. Spooky action at a distance is inferred from correlation of the states over a large number of events. Which is why quantum computing is not going to be as fast as everyone thinks it will be.
Can you say: "Lodestone Resonator"?? :-O
They cost a million bucks and they don't.
Huh?..Can i bring them home? : Yes and no!
WTF?? : Perhaps!
Jokes aside, i think entangled wedding rings would sell pretty well. :-O
What about entangled ethernet cards for finance banks and hardcore gamers.
Or entangled radiators. Throw some in the Sahara dessert and sell the entangled cast iron opposites for $2.000 each
I thought entanglement required products from the same origin.
Just when I figured I might have a small handle on things quantum...
This might be the event we look back on 100 years from now as the closest thing to the fictional dilithium crystals.
JJ
Coming from a non-physicist - when people talk about a superposition of two particles that are quantum entangled are they just saying "we know an event happened to one of these particles we just don't know which one until we look". For example if I had two cards layed face down, and picked one at random, could I argue that the cards were "entangled" because if one was picked, the other was "instanteneously" known to be not picked, regardless of distance, and until I looked the two cards were in a "superposition" of both being picked and not picked?
If that's the case, then in quantum computing, why would someone be able to store or process an exponentially increasing amount of information through having more qubits? (since users would only see one unchanging state if the ever observed their data) Also it would seem there's any number of macroscopic ways to simulate a supercondition without the need to entangle individual photons.
We are both amused and not amused.
Is this again just a theory?
Am i missing something or there is still no evidence?
You are definitely missing something.
A theory is the top of the food chain, otherwise known as a fact.
A theory is something never once proven wrong, and so far always shown to be correct.
So no evidence means it is a "guess"
Wording your "guess" into a form that can be proven false means it now becomes a "hypothesis"
A hypothesis that has never once been proven incorrect is then called a "theory" in science and "fact" in real life.
If any of the three, a theory, hypothesis, or guess is ever proven false, then it gets bumped down one below guess, and we now call it "incorrect"
P1. We can only know for certain what we measure. C1. So, the best physical law can only predict future measurements. C2. So, it is not the case that the particle is vibrating and not vibrating, but rather that we can not know if the particle is vibrating, or not, before we perform a measurement.
Does it matter if the state of an unmeasured system is indeterminate? After all, isn't that the definition of an unobserved system?
take a look at Elitzur–Vaidman bomb tester thought experiment:
Consider a collection of bombs, some of which are duds. Suppose these bombs carry a certain perfect property: usable bombs have a photon-triggered sensor which will absorb a photon and detonate. Dud bombs have a malfunctioning sensor which will not interfere with any photons.[4] The problem is how to separate at least some of the usable bombs from the duds. A bomb sorter could accumulate dud bombs by attempting to detonate each one. Unfortunately, this naive process destroys all the usable bombs.
apparently, quantum mechanics allows one to actually identify (some) working bombs without blowing them um.
A theory is the top of the food chain, otherwise known as a fact.
A theory is something never once proven wrong, and so far always shown to be correct.
Lies! How this particular bit of misinformation entered the mainstream I'll never know.
A theory is a predictive model. A hypothesis is a testable prediction. There are plenty of theories (that are still theories) which have been abandoned because the predictions they make are not supported by evidence and experiment. (You don't test a theory, you can't, you can only test the predictions that it makes!)
Required reading for internet skeptics
like a hyperspace but outside normal space allows this communication to happen, can i prove it nope but its logical.