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Quantifying multipartite nonlocality

Published in Physical Review Letters. 2009, vol. 103, no. 09503, p. 09503-1-4
Abstract The nonlocal correlations of multipartite entangled states can be reproduced by a classical model if sufficiently many parties join together or if sufficiently many parties broadcast their measurement inputs. The maximal number m of groups and the minimal number k of broadcasting parties that allow for the reproduction of a given set of correlations quantify their multipartite nonlocal content. We show how upper bounds on m and lower bounds on k can be computed from the violation of the Mermin-Svetlichny inequalities. While n-partite Greenberger-Horne-Zeilinger states violate these inequalities maximally, we find that W states violate them only by a very small amount.
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Other version: http://link.aps.org/doi/10.1103/PhysRevLett.103.090503
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BANCAL, Jean-Daniel et al. Quantifying multipartite nonlocality. In: Physical Review Letters, 2009, vol. 103, n° 09503, p. 09503-1-4. https://archive-ouverte.unige.ch/unige:3848

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Deposited on : 2009-10-20

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