Nonlocality of $W$ and Dicke states subject to losses

Gilles P\"utz; Jonatan Bohr Brask; Nicolas Brunner; Nicolas Gisin; Tomer Jack Barnea; Yeong-Cherng Liang

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Nonlocality of $W$ and Dicke states subject to losses

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arxiv 1412.5953 v1 pith:H5TGVOSH submitted 2014-12-18 quant-ph

Tomer Jack Barnea , Gilles Pütz , Jonatan Bohr Brask , Nicolas Brunner , Nicolas Gisin , Yeong-Cherng Liang This is my paper

classification quant-ph

keywords dickenonlocalitystateslosslossessubjectclearconsider

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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.

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