Entanglement criteria for the three-qubit states

被引：10

作者：

Akbari-Kourbolagh, Y. ^{[1
]}

机构：

[1] Azarbaijan Shahid Madani Univ, Dept Phys, Tabriz 53741161, Iran

来源：

INTERNATIONAL JOURNAL OF QUANTUM INFORMATION | 2017年 / 15卷 / 07期

关键词：

Entanglement criteria; GHZ state; W state; PPT entangled state; SEPARABILITY;

D O I：

10.1142/S0219749917500496

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

We present sufficient criteria for the entanglement of three-qubit states. For some special families of states, the criteria are also necessary for the entanglement. They are formulated as simple sets of inequalities for the mean values of certain observables defined as tensor products of Pauli matrices. The criteria are good indicators of the entanglement in the vicinity of three-qubit GHZ and W states and enjoy the capability of detecting the entangled states with positive partial transpositions. Furthermore, they improve the best known result for the case of W state mixed with the white noise. The efficiency of the criteria is illustrated through several examples.

引用

页数：10

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