Unified View of Quantum and Classical Correlations

被引：730

作者：

Modi, Kavan ^{[1
]}

Paterek, Tomasz ^{[1
]}

Son, Wonmin ^{[1
]}

Vedral, Vlatko ^{[1
,2
,3
]}

Williamson, Mark ^{[1
]}

机构：

[1] Natl Univ Singapore, Ctr Quantum Technol, Singapore 117548, Singapore

[2] Natl Univ Singapore, Dept Phys, Singapore 117548, Singapore

[3] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 08期

基金：

新加坡国家研究基金会;

关键词：

MECHANICAL DESCRIPTION; PHYSICAL REALITY; ENTANGLEMENT; ENTROPY; STATES;

D O I：

10.1103/PhysRevLett.104.080501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We discuss the problem of the separation of total correlations in a given quantum state into entanglement, dissonance, and classical correlations using the concept of relative entropy as a distance measure of correlations. This allows us to put all correlations on an equal footing. Entanglement and dissonance, whose definition is introduced here, jointly belong to what is known as quantum discord. Our methods are completely applicable for multipartite systems of arbitrary dimensions. We investigate additivity relations between different correlations and show that dissonance may be present in pure multipartite states.

引用

页数：4

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