Entanglement criteria for Dicke states

被引：42

作者：

Bergmann, Marcel ^{[1
,2
]}

Guehne, Otfried ^{[2
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Phys, D-55128 Mainz, Germany

[2] Univ Siegen, Nat Wissenschaftlich Tech Fak, D-57068 Siegen, Germany

来源：

JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL | 2013年 / 46卷 / 38期

关键词：

QUANTUM;

D O I：

10.1088/1751-8113/46/38/385304

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Dicke states are a family of multi-qubit quantum states with interesting entanglement properties and they have been observed in many experiments. We construct entanglement witnesses for detecting genuine multiparticle entanglement in the vicinity of these states. We use the approach of positive partial transpose mixtures to derive the conditions analytically. For nearly all cases, our criteria are stronger than all conditions previously known.

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