Friday, April 5, 2013

1304.1163 (Benjamin Aaronson et al.)

Freezing of quantum correlations under nondissipative decoherence is
universal
   [PDF]

Benjamin Aaronson, Rosario Lo Franco, Gerardo Adesso
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 generically 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 phenomenon.
View original: http://arxiv.org/abs/1304.1163

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