Detecting genuine multipartite continuous-variable entanglement

被引：383
作者：
van Loock, P [1 ]
Furusawa, A
机构：
[1] Univ Erlangen Nurnberg, Zentrum Moderne Opt, Quantum Informat Theory Grp, D-91058 Erlangen, Germany
[2] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan
来源：
PHYSICAL REVIEW A | 2003年 / 67卷 / 05期
关键词：
D O I：
10.1103/PhysRevA.67.052315
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We derive necessary conditions in terms of the variances of position and momentum linear combinations for all kinds of separability of a multiparty multimode continuous-variable state. Their violations can be sufficient for genuine multipartite entanglement, provided the combinations contain both conjugate variables of all modes. Hence, a complete state determination, for example, by detecting the entire correlation matrix of a Gaussian state, is not needed.
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页数：13
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