The Reciprocal of the Mean Quantum Fisher Information per Particle in Generalized Two-Axis Twisting Model

被引：0
作者：
Rong-Hua Chen
Hong-Gang Yi
机构：
[1] Jiangxi Institute of Education,Department of Physics
来源：
International Journal of Theoretical Physics | 2013年 / 52卷
关键词：
Quantum Fisher information; Generalized two-axis twisting; Frozen-spin approximation;
D O I：
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学科分类号：
摘要：
We investigate the reciprocal of the mean quantum Fisher information per particle (RMQFI) 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 RMQFI on the external field. By adopting frozen-spin approximation, we obtain the theoretical and numerical results for RMQFI, which is a periodical function. Except certain special conditions, the state is always entangled and the stronger external field induces to stronger entanglement and larger period of oscillation of RMQFI.
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页码：2224 / 2229
页数：5
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