Can there be quantum correlations in a mixture of two separable states?

Details Can there be quantum correlations in a mixture of two separable states? Can there be quantum correlations in a mixture of two separable states?

2002-03-03

arxiv.org/abs/quant-ph/0203007v4

Journal of Modern Optics 50, 981 - 985 (2003)

Physics

Quantum Physics

LaTeX, no figures; Error deleted, some new results and discussions added

Scientific paper

10.1080/09500340308234547

We use a recently proposed measure of quantum correlations (work deficit), to measure the strength of the nonlocality of an equal mixture of two bipartite, orthogonal, but locally indistinguishable separable states. This gives supporting evidence of nonzero value for a separable state, for this measure of nonlocality. We also show that this measure of quantum correlations places a different order on the set of states, than the good asymptotic measures of entanglement. And that such a different order imposed on two states by the work deficit and any entanglement measure, cannot be explained by mixedness alone.

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