Spin Squeezing and Quantum Fisher Information in Generalized Two-Axis Twisting Model

被引：0
作者：
Yan-Hu Jiang
Song-Song Li
机构：
[1] Jiangxi Institute of Education,Department of Physics
来源：
International Journal of Theoretical Physics | 2013年 / 52卷
关键词：
Spin squeezing; Quantum Fisher information; Generalized two-axis twisting; Frozen-spin approximation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We investigated spin squeezing and quantum Fisher information in generalized two-axis twisting model; which generalizes the two-axis twisting model including a linear interaction controlled by an external field. In particular, we are interested in the dependence of spin squeezing and quantum Fisher information on the external field. By adopting frozen-spin approximation, we derive the theoretical and numerical results for spin squeezing and quantum Fisher information. Except certain special conditions, the stronger external field induces to stronger squeezing. Spin squeezing parameter and the reciprocal of the mean quantum Fisher information per particle are periodic function; but the external field has not important effect on the period.
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页码：2826 / 2832
页数：6
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