Controlling Many-Body Entanglement with an External Field

被引：0
|
作者：
Lai, Xiao-Bing [1 ]
Bian, Zu-Wu [2 ]
机构：
[1] Jiangxi Inst Educ, Dept Phys, Nanchang 330029, Peoples R China
[2] Nanchang Normal Coll, Div Dept Nat Sci, Nanchang 330029, Peoples R China
来源：
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS | 2013年 / 52卷 / 08期
关键词：
Quantum entanglement; Spin squeezing; Quantum Fisher information; Frozen-spin approximation; QUANTUM FISHER INFORMATION; STATISTICAL DISTANCE;
D O I：
10.1007/s10773-013-1546-y
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigate how an appropriate choice of the external field allows one to control many-body entanglement characterized by spin squeezing and the reciprocal of mean quantum Fisher information per particle (RMQFI). By adopting frozen-spin approximation, we succussed in obtaining analytical expressions of the spin squeezing parameter and RMQFI. The stronger external field induces stronger squeezing, the smaller value of RMQFI and the larger period.
引用
收藏
页码：2592 / 2598
页数：7
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