Wednesday, June 12, 2013

1306.2574 (Karl-Peter Marzlin et al.)

Quantum Collapse Bell Inequalities    [PDF]

Karl-Peter Marzlin, T. A. Osborn
We propose Bell inequalities for discrete or continuous quantum systems which test the compatibility of quantum physics with an interpretation in terms of deterministic hidden-variable theories. The wave function collapse that occurs in a sequence of quantum measurements enters the upper bound via the concept of quantum conditional probabilities. The resulting hidden-variable inequality is applicable to an arbitrary observable that is decomposable into a weighted sum of non-commuting projectors. We present local and non-local examples of violation of generalized Bell inequalities in phase space, which sense the negativity of the Wigner function.
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