Entanglement conditions for two-mode states

被引：348

作者：

Hillery, M

Zubairy, MS

机构：

[1] CUNY Hunter Coll, Dept Phys, New York, NY 10021 USA

[2] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA

[3] Texas A&M Univ, Inst Quantum Studies, College Stn, TX 77843 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.96.050503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We provide a class of inequalities whose violation shows the presence of entanglement in two-mode systems. We initially consider observables that are quadratic in the mode creation and annihilation operators and find conditions under which a two-mode state is entangled. Further examination allows us to formulate additional conditions for detecting entanglement. We conclude by showing how the methods used here can be extended to find entanglement in systems of more than two modes.

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页数：4

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