منابع مشابه
“Haunted” quantum contextuality
Two entangled particles in threedimensional Hilbert space (per particle) are considered in an EPR-type arrangement. On each side the Kochen-Specker observables {J 1 , J 2 2 , J 2 3 } and {J̄ 2 1 , J̄ 2 2 , J 2 3 } with [J 2 1 , J̄ 2 1 ] 6= 0 are measured. The outcomes of measurements of J 3 (via J 2 1 , J 2 2 ) and J 2 3 (via J̄ 1 , J̄ 2 2 ) are compared. We investigate the possibility that, althoug...
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Decoherence is the most widely accepted mechanism to explain the loss of coherence in quantum systems. Here we show how simple (quantum) trajectory–based models can help to understand the physics behind decoherence processes. In particular, we will analyze with these models the relationship between decoherence and quantum contextuality in the double–slit experiment, where two (quantum) contexts...
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Contextuality is a central property in comparative analysis of classical, quantum, and supercorrelated systems. We examine and compare two well-motivated approaches to contextuality. One approach (“contextuality-by-default”) is based on the idea that one and the same physical property measured under different conditions (contexts) is represented by different random variables. The other approach...
متن کاملTesting quantum contextuality
Two entangled particles in threedimensional Hilbert space (per particle) are considered in an EPR-type arrangement. On each side the Kochen-Specker observables {J 1 , J 2 2 , J 2 3 } and {J̄ 2 1 , J̄ 2 2 , J 2 3 } with [J 2 1 , J̄ 2 1 ] 6= 0 are measured. The outcomes of measurements of J 3 (via J 2 1 , J 2 2 ) and J 2 3 (via J̄ 1 , J̄ 2 2 ) are compared. Although formally J 2 3 is associated with t...
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Recently, several inequalities involving sequences of measurements have been proposed which hold for non-contextual models but which are violated in quantum mechanics. They also have been found to be violated in experiments and the violation is independent of the prepared quantum state. A typical contextual model explaining this violation uses a classical memory. We investigate the required mem...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2012
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.109.020404