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 that relies on quantum correlations as a resource will run with a performance completely unaffected by noise in the specified dynamical conditions. We provide a geometric interpretation of this phenomenon.
Aaronson, B., Lo Franco, R., Adesso, G. (2013). Comparative investigation of the freezing phenomena for quantum correlations under nondissipative decoherence. PHYSICAL REVIEW A, 88(1), 012120 [10.1103/PhysRevA.88.012120].
Comparative investigation of the freezing phenomena for quantum correlations under nondissipative decoherence
LO FRANCO, Rosario;
2013-01-01
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 that relies on quantum correlations as a resource will run with a performance completely unaffected by noise in the specified dynamical conditions. We provide a geometric interpretation of this phenomenon.File | Dimensione | Formato | |
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