Effect of decoherence on the contextual and nonlocal properties of a biphoton

A. Shaham, H. S. Eisenberg

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4 Scopus citations


Quantum contextuality is a nonintuitive property of quantum mechanics that distinguishes it from any classical theory. A complementary quantum property is quantum nonlocality, which is an essential resource for many quantum information tasks. Here we experimentally study the contextual and nonlocal properties of polarization biphotons. First, we investigate the ability of the biphotons to exhibit contextuality by testing the violation of the Klyachko-Can-Binicioʇlu-Shumovsky (KCBS) inequality. In order to do so, we used the original protocol suggested in the KCBS paper and adjusted it to the real scenario, where some of the biphotons are distinguishable. Second, we transmitted the biphotons through different unital channels with a controlled amount of noise. We measured the decohered output states and demonstrated that the ability to exhibit quantum contextuality using the KCBS inequality is more fragile to noise than the ability to exhibit nonlocality.

Original languageAmerican English
Article number022123
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number2
StatePublished - 27 Feb 2015

Bibliographical note

Publisher Copyright:
© 2015 American Physical Society.


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