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

被引:159
作者
Aaronson, Benjamin [1 ]
Lo Franco, Rosario [2 ]
Adesso, Gerardo [1 ]
机构
[1] Univ Nottingham, Sch Math Sci, Univ Pk, Nottingham NG7 2RD, England
[2] Univ Palermo, Dipartimento Fis & Chim, I-90123 Palermo, Italy
来源
PHYSICAL REVIEW A | 2013年 / 88卷 / 01期
基金
英国工程与自然科学研究理事会;
关键词
DISCORD;
D O I
10.1103/PhysRevA.88.012120
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
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.
引用
收藏
页数:7
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