Spin Squeezing in Superpositions of GHZ State and W States

被引：4

作者：

Yi, Xiao-Jie ^{[1
]}

Huang, Guo-Qiang ^{[2
]}

Wang, Jian-Min ^{[1
]}

机构：

[1] Jiangxi Sci & Technol Normal Univ, Coll Commun & Electron, Nanchang 330013, Peoples R China

[2] Jiangxi Univ Finance & Econ, Nanchang 330013, Peoples R China

来源：

INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS | 2012年 / 51卷 / 09期

关键词：

Spin squeezing; Superpositions; GHZ state; W state; SEPARABILITY CRITERION; ENTANGLEMENT;

D O I：

10.1007/s10773-012-1177-8

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the spin squeezing in superpositions of a N-qubit GHZ state and two W states. The spin squeezing parameter is determined by the superposition coefficients and the relative phase. It is shown that there is squeezing in the n (2) direction and there is no squeezing in the n (1) direction. It is also shown that the state with more number of qubits has smaller spin squeezing parameter.

引用

页码：2960 / 2965

页数：6

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