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Article overview
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Study of nonlocal correlations in macroscopic measurement scenario | | Samir Kunkri
; Manik Banik
; Sibasish Ghosh
; | | Date: |
11 Apr 2016 | | Abstract: | Nonlocality is one of the main characteristic features of quantum systems
involving more than one spatially separated subsystems. It is manifested
theoretically as well as experimentally through violation of some emph{local
realistic} inequality. But, generally it is difficult to deal with individual
particle in real experiment. One has to rather address beam of particles which
may cause dilution of nonlocal behavior. Moreover, classical behavior of all
physical phenomena at macroscopic limit gives a general intuition that any
emph{physical} theory for describing microscopic phenomena should resemble
classical physics at macroscopic regime. In the 2-2-2 scenario (two parties,
each performing two measurements, each measurement with two outcomes),
contemplating all the correlations that may be stronger than quantum mechanics
in exhibiting nonlocal behavior, yet weak enough to prohibit instantaneous
signaling, we characterize which of them exhibit emph{classical}
(emph{local-realistic}) behaviour in the microscopic scale. Interestingly, we
find that their exist correlations which indeed remain nonlocal at the
macroscopic scale and hence fail to be considered as physical one. Our study
thus provides a sufficient criterion to identify some of unphysical
correlations. | | Source: | arXiv, 1604.2777 | | Services: | Forum | Review | PDF | Favorites | |
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