Quantum Contextuality in Time without Inequality
- URL: http://arxiv.org/abs/2206.02581v2
- Date: Fri, 19 Apr 2024 09:40:19 GMT
- Title: Quantum Contextuality in Time without Inequality
- Authors: Md Manirul Ali, Sovik Roy,
- Abstract summary: Bell-Kochen-Specker theorem states that a non-contextual hidden- variable theory cannot reproduce predictions of quantum mechanics.
Asher Peres gave a simple proof of quantum contextuality in a four-dimensional Hilbert space of two spin-1/2 particles.
We present a proof of quantum contextuality in time using the temporal version of Peres's contextuality argument.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Bell-Kochen-Specker theorem states that a non-contextual hidden-variable theory cannot completely reproduce the predictions of quantum mechanics. Asher Peres gave a remarkably simple proof of quantum contextuality in a four-dimensional Hilbert space of two spin-1/2 particles. Peres's argument is enormously simpler than that of Kochen and Specker. Peres contextuality demonstrates a logical contradiction between quantum mechanics and the noncontextual hidden variable models by showing an inconsistency when assigning noncontextual definite values to a certain set of quantum observables. In this work, we present a proof of quantum contextuality in time using the temporal version of Peres's contextuality argument. In analogy with the two-particle version of Peres's contextuality argument in the context of spin measurements at two different locations, we consider here single-particle spin measurements at two different times t=t1 and t=t2 where the context is provided through the time separation. Our results can be experimentally verified with the present quantum technology.
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