Quantifying multipartite nonlocality

Details Quantifying multipartite nonlocality Quantifying multipartite nonlocality

2009-03-16

arxiv.org/abs/0903.2715v2

Phys. Rev. Lett. 103, 090503 (2009)

Physics

Quantum Physics

4 pages, 3 figures. v2: minor changes

Scientific paper

10.1103/PhysRevLett.103.090503

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 GHZ states violate these inequalities maximally, we find that W states violate them only by a very small amount.

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