Entanglement conditions for two-mode states

被引：346
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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