English

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

Quantum Physics 2009-10-19 v4

Abstract

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.

Keywords

Cite

@article{arxiv.quant-ph/0203007,
  title  = {Can there be quantum correlations in a mixture of two separable states?},
  author = {Aditi Sen De and Ujjwal Sen},
  journal= {arXiv preprint arXiv:quant-ph/0203007},
  year   = {2009}
}

Comments

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

R2 v1 2026-07-22T19:34:07.939Z