Quantifying multipartite entanglement

被引：0

作者：

Wei, TC ^{[1
]}

Altepeter, JB ^{[1
]}

Das, D ^{[1
]}

Ericsson, M ^{[1
]}

Goldbart, PM ^{[1
]}

Mukhopadyay, S ^{[1
]}

Munro, WJ ^{[1
]}

Vishveshwara, S ^{[1
]}

机构：

[1] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

来源：

QUANTUM COMMUNICATION, MEASUREMENT AND COMPUTING | 2004年 / 734卷

关键词：

D O I：

暂无

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

A natural way of quantifying the degree of entanglement for a pure quantum state is to compare how far this state is from the set of all unentangled pure states. This geometric measure of entanglement is explored for bipartite and multipartite pure and mixed states. It is determined analytically for arbitrary two-qubit mixed states and for generalized Werner and isotropic states. It is also applied to certain multipartite mixed states. including two multipartite bound entangeled states discovered by Smolin and Dur. Moreover, the geometric measure of entanglement is applied to the ground state of the Ising model in a transverse magnetic field. From this model the entanglement is shown to exhibit singular behavior at the quantum critical point.

引用

页码：241 / 244

页数：4

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