Entanglement and discord: Accelerated observations of local and global modes

被引：58

作者：

Doukas, Jason ^{[1
]}

Brown, Eric G. ^{[2
]}

Dragan, Andrzej ^{[3
]}

Mann, Robert B. ^{[2
,4
]}

机构：

[1] Res Org Informat & Syst, Natl Inst Informat, Chiyoda Ku, Tokyo 1018430, Japan

[2] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada

[3] Univ Warsaw, Inst Theoret Phys, PL-00049 Warsaw, Poland

[4] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada

来源：

PHYSICAL REVIEW A | 2013年 / 87卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevA.87.012306

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the amount of entanglement and quantum discord extractable from a two-mode squeezed state as considered from the viewpoint of two observers, Alice (inertial) and Rob (accelerated). We find that using localized modes produces qualitatively different correlation properties for large accelerations than do Unruh modes. Specifically, the entanglement undergoes a sudden death as a function of acceleration, and the discord asymptotes to zero in the limit of infinite acceleration. We conclude that the previous Unruh mode analyses do not determine the acceleration-dependent entanglement and discord degradation of a given quantum state. DOI: 10.1103/PhysRevA.87.012306

引用

页数：6

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