Hierarchy in temporal quantum correlations

被引：25

作者：

Ku, Huan-Yu ^{[1
,2
]}

Chen, Shin-Liang ^{[1
,3
]}

Lambert, Neill ^{[2
]}

Chen, Yueh-Nan ^{[1
,2
,4
]}

Nori, Franco ^{[2
,5
]}

机构：

[1] Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan

[2] RIKEN, Cluster Pioneering Res, Theoret Quantum Phys Lab, Wako, Saitama 3510198, Japan

[3] Max Planck Inst Quantum Opt, Hans Kopfermann Str 1, D-85748 Garching, Germany

[4] Natl Ctr Theoret Sci, Phys Div, Hsinchu 300, Taiwan

[5] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

来源：

PHYSICAL REVIEW A | 2018年 / 98卷 / 02期

基金：

日本学术振兴会; 日本科学技术振兴机构;

关键词：

SEPARABILITY; MECHANICS; SYSTEMS; STATE;

D O I：

10.1103/PhysRevA.98.022104

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Einstein-Podolsky-Rosen (EPR) steering is an intermediate quantum correlation that lies in between entanglement and Bell nonlocality. Its temporal analog, temporal steering, has recently been shown to have applications in quantum information and open quantum systems. Here we show that there exists a hierarchy among the three temporal quantum correlations: temporal inseparability, temporal steering, and macrorealism. Given that the temporal inseparability can be used to define a measure of quantum causality, similarly the quantification of temporal steering can be viewed as a weaker measure of direct cause and can be used to distinguish between direct cause and common cause in a quantum network.

引用

页数：9

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