Monogamy of quantum discord by multipartite correlations

被引：43

作者：

Braga, H. C. ^{[1
]}

Rulli, C. C. ^{[1
]}

de Oliveira, Thiago R. ^{[1
]}

Sarandy, M. S. ^{[1
]}

机构：

[1] Univ Fed Fluminense, Inst Fis, BR-24210346 Niteroi, RJ, Brazil

来源：

PHYSICAL REVIEW A | 2012年 / 86卷 / 06期

关键词：

CLASSICAL CORRELATIONS;

D O I：

10.1103/PhysRevA.86.062106

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We introduce a monogamy inequality for quantum correlations, which implies that the sum of pairwise quantum correlations is upper limited by the amount of multipartite quantum correlations as measured by the global quantum discord. This monogamy bound holds either for pure or mixed quantum states provided that bipartite quantum discord does not increase under discard of subsystems. We illustrate the monogamy behavior for multipartite pure states with Schmidt decomposition as well as for W-GHZ mixed states. As a by-product, we apply the monogamy bound to investigate residual multipartite correlations. DOI: 10.1103/PhysRevA.86.062106

引用

页数：5

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