Quantum correlations relativity for continuous variable systems

被引：14

作者：

Dugic, M. ^{[1
]}

Arsenijevic, M. ^{[1
]}

Jeknic-Dugic, J. ^{[2
]}

机构：

[1] Fac Sci, Dept Phys, Kragujevac 34000, Serbia

[2] Fac Sci, Dept Phys, Nish 18000, Serbia

来源：

SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY | 2013年 / 56卷 / 04期

关键词：

entanglement; non-classical correlations; quantum discord; tensor product structure; ENTANGLEMENT; DISCORD;

D O I：

10.1007/s11433-012-4912-5

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

It is shown that a choice of degrees of freedom of a bipartite continuous variable system determines the amount of non-classical correlations (quantified by discord) in the system's state. Non-classical correlations (that include entanglement as a special kind of correlations) are ubiquitous for such systems. For a quantum state, if there are not non-classical correlations (quantum discord is zero) for one, there are in general non-classical correlations (quantum discord is non-zero) for another set of the composite system's degrees of freedom. The physical relevance of this "quantum correlations relativity" is emphasized also in the more general context.

引用

页码：732 / 736

页数：5

共 21 条

[1] TELEPORTING AN UNKNOWN QUANTUM STATE VIA DUAL CLASSICAL AND EINSTEIN-PODOLSKY-ROSEN CHANNELS [J].