Verifying multipartite mode entanglement of W states

被引：31

作者：

Lougovski, Pavel ^{[1
,2
]}

van Enk, S. J. ^{[1
,2
,3
]}

Choi, Kyung Soo ^{[4
]}

Papp, Scott B. ^{[4
]}

Deng, Hui ^{[4
]}

Kimble, H. J. ^{[4
]}

机构：

[1] 1274 Univ Oregon, Dept Phys, Eugene, OR 97403 USA

[2] 1274 Univ Oregon, Oregon Ctr Opt, Eugene, OR 97403 USA

[3] CALTECH, Inst Quantum Informat, Pasadena, CA 91125 USA

[4] CALTECH, Norman Bridge Lab Phys, Pasadena, CA 91125 USA

来源：

NEW JOURNAL OF PHYSICS | 2009年 / 11卷

关键词：

SINGLE-PHOTON; NONLOCALITY; SEPARABILITY;

D O I：

10.1088/1367-2630/11/6/063029

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We construct a method for verifying mode entanglement of N-mode W states. The ideal W state contains exactly one excitation symmetrically shared between N modes, but our method takes the existence of higher numbers of excitations into account, as well as the vacuum state and other deviations from the ideal state. Moreover, our method distinguishes between full N-party entanglement and states with M-party entanglement with M < N, including mixtures of the latter. We specialize to the case N = 4 for illustrative purposes. In the optical case, where excitations are photons, our method can be implemented using linear optics.

引用

页数：22

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