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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