Quantum Entaglement

[Bereta_Eder]

What the hell is it?
Can you really send info faster than the speed of light?
Some say yes, some say no.
Most don't understand what it is.

Will the spinning be actually determined the moment you measure it?
If that is so, and if by your action you define the spin, then the other atom at the far end of the galaxy has the opposite spin.
So WHY the hell can't it be used to transfer info faster than the speed of light?

[Bereta_Eder]

(it's a very slow day)

[Donegeal]

JM explained it to me once. I think I understood at the time, but I don't remember what he said.

[loinburger]

I've read a few science fiction stories that used quantum entanglement for communication, and in most of them the problem is that you've got to use slower than light travel to get the particles to their destinations. So you can communicate instantaneously with Alpha Centauri, but only you've got a minimum 4 year lag time.

[Proteus_MST]

Actually if this article is true: http://www.sciencedaily.com/releases...1205142218.htm Then entangled particles probabbly don´t "communicate" faster than light ... instead they just create a wormhole to the other one whenever a state of one of them changes. With other words ... if we consider their local space they just "communicate" with lightspeed, but thanks to their shortcut through the wormhole (instead of following the normal curvature of spacetime) their communication seems to be faster than communication that has to follow the normal curvature of space

[loinburger]

There's been research into quantum cryptography, which uses quantum entanglement to allow "unconditionally secure key distribution" whereas at present public key distribution relies on conditions such as prime factorization being computationally difficult (i.e. that deterministic polynomial time algorithms are a proper subset of non-deterministic polynomial time algorithms or P != NP, something that is generally assumed but has not been proven). It looks a bit **** to me, for example according to the article the two parties trying to communicate still need a way to authenticate each others' identities, and that's much more difficult than merely establishing a shared key.

[kentonio]

Actually if this article is true: http://www.sciencedaily.com/releases...1205142218.htm Then entangled particles probabbly don´t "communicate" faster than light ... instead they just create a wormhole to the other one whenever a state of one of them changes. With other words ... if we consider their local space they just "communicate" with lightspeed, but thanks to their shortcut through the wormhole (instead of following the normal curvature of spacetime) their communication seems to be faster than communication that has to follow the normal curvature of space

The wormhole bit is awesome, but that article also says gravity could be a result of quantum entanglement. Wow.

[PLATO]

What the hell is it?

Spooky action at a distance....duh Einstein!