Bounding Quantum Contextuality with Lack of Third-Order Interference

Joe Henson
Phys. Rev. Lett. 114, 220403 – Published 4 June 2015

Abstract

Recently, many simple principles have been proposed that can explain quantum limitations on possible sets of experimental probabilities in nonlocality and contextuality experiments. However, few implications between these principles are known. Here it is shown that the lack of irreducible third-order interference (a generalization of the idea that no probabilistic interference remains unaccounted for once we have taken into account interference between pairs of slits in a n-sit experiment) implies the principle known as the E principle or consistent exclusivity (that, if each pair of a set of experimental outcomes are exclusive alternatives in some measurement, then their probabilities are consistent with the existence of a further measurement in which they are all exclusive). This is a step towards a more unified understanding of quantum nonlocality and contextuality, which promises to allow derivations of important results from minimal, easily grasped assumptions. As one example, this result implies that lack of third-order interference bounds violation of the Clauser-Horne-Shimony-Holt-Bell inequality to 2.883.

  • Received 12 June 2014

DOI:https://doi.org/10.1103/PhysRevLett.114.220403

© 2015 American Physical Society

Authors & Affiliations

Joe Henson

  • H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, United Kingdom

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Issue

Vol. 114, Iss. 22 — 5 June 2015

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