Wednesday, May 10, 2017

Quantum entanglement: does it necessarily imply superluminal information transfer?



From what I understand, information is communicated instantly between two quantum-entangled particles regardless of the spatial distance between them. However, does this necessarily imply superluminal data transfer? If the "distance" between the particles is simply assumed to be measured in our common 3D euclidean space then that would seem to imply superluminal communication. However, could there be other paths between the two particles that lie beyond our observable 3D euclidean space, other paths that involve additional dimensions in which the particles remain very close or some sort of folding of space on other dimensions that provide an information pathway? Anybody aware of any such research/findings? Thnx.



Answer



No, I think you are mistaken. Entanglement cannot be used to transmit information. Two distant experimenters each with one of two entangled electrons cannot communicate by performing measurements of their electrons.


Furthermore, entanglement doesn't imply that quantum mechanics is nonlocal, i.e., that there is spooky, instantaneous action at a distance. If you follow the common Copenhagen interpretation of the wavefuction, the wave function has no physical meaning prior to measurement. Nothing passes between the electrons upon measurement. All that changes upon measurement is our state of knowledge.


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