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American Physical Society, Physical Review A, 3(91)

DOI: 10.1103/physreva.91.032108

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Nonlocality ofWand Dicke states subject to losses

Journal article published in 2015 by Tomer Jack Barnea, Gilles Pütz, Jonatan Bohr Brask, Nicolas Brunner, Nicolas Gisin, Yeong-Cherng Liang ORCID
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This paper is available in a repository.

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Abstract

We discuss the nonlocality of the $W$ and the Dicke states subject to losses. We consider two noise models, namely loss of excitations and loss of particles, and investigate how much loss can be tolerated such that the final state remains nonlocal. This leads to a measure of robustness of the nonlocality of Dicke states, with a clear physical interpretation. Our results suggest that the relation between nonlocality and entanglement of Dicke states is not monotonous. ; Comment: 7 pages, 5 figures