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Comparative investigation of the freezing phenomena for quantum correlations under nondissipative decoherence

Quantum Physics 2013-07-23 v2 Statistical Mechanics Mathematical Physics math.MP Optics

Abstract

We show that the phenomenon of frozen discord, exhibited by specific classes of two-qubit states under local nondissipative decoherent evolutions, is a common feature of all known bona fide measures of general quantum correlations. All those measures, despite inducing typically inequivalent orderings on the set of nonclassically correlated states, return a constant value in the considered settings. Every communication protocol which relies on quantum correlations as resource will run with a performance completely unaffected by noise in the specified dynamical conditions. We provide a geometric interpretation of this

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Cite

@article{arxiv.1304.1163,
  title  = {Comparative investigation of the freezing phenomena for quantum correlations under nondissipative decoherence},
  author = {Benjamin Aaronson and Rosario Lo Franco and Gerardo Adesso},
  journal= {arXiv preprint arXiv:1304.1163},
  year   = {2013}
}

Comments

7 pages, 2 figures, 1 table; title changed to match published version