Bose-Einstein condensates and quantum non-locality

Details Bose-Einstein condensates and quantum non-locality Bose-Einstein condensates and quantum non-locality

2006-11-02

arxiv.org/abs/cond-mat/0611043v1

Beyond the quantum, World Scientific (Ed.) (2007) 35

Physics

Condensed Matter

Other Condensed Matter

contribution to the workshop "Beyond que quantum", at the Lorentz Institute (Leiden, Netherlands) in may 2006

Scientific paper

The EPR argument points to the existence of additional variables that are necessary to complete standard quantum theory. It was dismissed by Bohr because it attributes physical reality to isolated microscopic systems, independently of the macroscopic measurement apparatus. Here, we transpose the EPR argument to macroscopic systems, assuming that they are in spatially extended Fock spin states and subject to spin measurements in remote regions of space. Bohr's refutation of the EPR argument does not seem to apply in this case, since the difference of scale between the microscopic measured system and the macroscopic measuring apparatus can no longer be invoked.

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