Additivity relations in quantum correlations

被引：5

作者：

Yang, Seungho ^{[1
]}

Jeong, Hyunseok ^{[1
]}

Son, Wonmin ^{[2
]}

机构：

[1] Seoul Natl Univ, Dept Phys & Astron, Ctr Macroscop Quantum Control, Seoul 151742, South Korea

[2] Sogang Univ, Dept Phys, Seoul 121742, South Korea

来源：

PHYSICAL REVIEW A | 2013年 / 87卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

ENTANGLEMENT; DISCORD; ENTROPY; INFORMATION;

D O I：

10.1103/PhysRevA.87.052114

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Does the sum of correlations in subsystems constitute the correlation in the total system? Such a concept can be expressed by an additivity relationship of correlations. From a strong subadditivity condition of von Neumann entropy, four different additivity relations in total correlation are derived and quantified. Based upon the classification of the additivity in total correlation, we identify the corresponding additive relationships in entanglement. It is also discussed that similar relationships are satisfied for quantum discord of pure states, but it is not always true for mixed states.

引用

页数：7

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