Simple Hardy-like proof of quantum contextuality
arXiv:1310.8330 · doi:10.1103/PhysRevLett.111.180404
Abstract
Contextuality and nonlocality are two fundamental properties of nature. Hardy's proof is considered the simplest proof of nonlocality and can also be seen as a particular violation of the simplest Bell inequality. A fundamental question is: Which is the simplest proof of contextuality? We show that there is a Hardy-like proof of contextuality that can also be seen as a particular violation of the simplest noncontextuality inequality. Interestingly, this new proof connects this inequality with the proof of the Kochen-Specker theorem, providing the missing link between these two fundamental results, and can be extended to an arbitrary odd number of settings, an extension that can be seen as a particular violation of the -cycle inequality.
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Cited by in corpus (40)
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