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Scientists in the Netherlands have moved a step closer to overriding one of Albert Einstein’s most famous objections to the implications of quantum mechanics, which he described as “spooky action at a distance.”
In a paper published on Thursday in the journal Science, physicists at the Kavli Institute of Nanoscience at the Delft University of Technology reported that they were able to reliably teleport information between two quantum bits separated by three meters, or about 10 feet.
Moreover, the scientists are now closer to definitively proving Einstein wrong in his early disbelief in the notion of entanglement, in which particles separated by light-years can still appear to remain connected, with the state of one particle instantaneously affecting the state of another.
They report that they have achieved perfectly accurate teleportation of quantum information over short distances. They are now seeking to repeat their experiment over the distance of more than a kilometer. If they are able to repeatedly show that entanglement works at this distance, it will be a definitive demonstration of the entanglement phenomenon and quantum mechanical theory.
originally posted by: TrueBrit
a reply to: LightningStrikesHere
Ok, first, as the article clearly states, this is not teleportation in the Star Trek sense. This article instead refers to the usage of an interesting quirk of quantum mechanics, namely, that two particles separated by vast distances, can appear to be linked together in such a way that changes applied to one of them, will be apparent in the other.
This means that data can be sent by entangling two objects together in the manner outlined above, so that the scientist can use the method to send binary signals. Now, over a distance of a few meters this seems utterly over the top, but how about over distances of thousands of miles? How about over distances of millions of miles?
The potential that this quantum entanglement method has, to extend the reach of, and speed of our communications in the future, cannot be understated. Obviously, at this time the apparatus required to perform such a feat is expensive and complicated, not to mention quite large, so do not expect to see a mobile telecom device which uses this method in your lifetime.
However, this method could make communications in and through space more effective, and it could also lead to new methods of recording data from afar, with the right tinkering and know how.
It is very exciting, but this method will not allow matter transportation, only data.
originally posted by: yuppa
a reply to: Sheesh
Read swannes post. i think you might be off on the speed.
originally posted by Lagrimas
Don't expect to see it in our life time? There's people alive today that saw the size of the first computer, and now we have phones with more power than Apollo missions. If you're under 25 expect to see this in yr life time... After ww3, of course.
originally posted by: swanne
a reply to: LightningStrikesHere
The question is not wether entanglement occurs. We do know that it does, and we already know that its speed is at least 6 orders of magnitudes the speed of light. The true question is how to resolve the EPR paradox. Meaning we don't know how come apparently FTL quantum information transfer doesn't violate causality.
In the OP, the scientist won't actually teleport anything - they'll simply show that entanglement switches the sign of the entangled particle. No biggie, it was already proven years ago.
But this means that if you collapse one particle's wave function by observing it, you'll instantaneously collapse the other particle's wave function too (since the same model was used for both particles) - no matter where the other particle is located. It could be at the end of the Universe, it won't matter: it'll still collapse, even if you never observed it.