多光子Tavis-Cummings模型中运动原子与二项式光场相互作用的量子纠缠

J4 ›› 2010, Vol. 27 ›› Issue (5): 580-585.

多光子Tavis-Cummings模型中运动原子与二项式光场相互作用的量子纠缠

包丽¹, 萨楚尔夫^1，2, 吴淑梅¹

1内蒙古师范大学物理与电子信息学院，内蒙古呼和浩特 010022;
2 内蒙古师范大学图书馆，内蒙古呼和浩特 010022

收稿日期:2009-12-07 修回日期:2010-02-03 出版日期:2010-09-28 发布日期:2010-08-31
通讯作者: 萨楚尔夫（1962—），男，蒙古族，内蒙古呼和浩特市人，博士，教授，主要从事量子光学研究. E-mail:Sacrf@imnu.edu.cn.
作者简介:包丽（1984—），女，蒙古族，黑龙江省大庆市人，在读研究生，研究方向为量子光学. E-ail: xiaozhu198359@126.com
基金资助:
国家自然科学基金项目（60467002）；内蒙古自然科学基金项目（2009MS0112）；内蒙古高等学校科研基金（NJ03038）

Quantum entanglement of the binomial field interacting with the moving atoms in the multiphoton Tavis-Cummings model

BAO Li¹，Sachuerfu^1，2，WU Shu-Mei ¹

College of Physics and Electronic Information, Inner Mongolia Normal University, Huhhot 010022, China

Received:2009-12-07 Revised:2010-02-03 Published:2010-09-28 Online:2010-08-31

摘要/Abstract

摘要：

利用全量子理论,研究了多光子Tavis-Cummings模型中运动原子与二项式光场相互作用系统的量子纠缠特性，讨论了不同初始状态下的二项式光场系数和原子运动速度对纠缠特性的影响.结果表明：二项式光场系数不影响场熵演化的周期性，但影响场熵峰值大小.随着原子跃迁光子数的增多，场熵演化的周期性和消纠缠现象逐渐消失.原子运动的速度影响场熵的演化周期，且影响场熵峰值的大小，而原子跃迁光子数的增大，会消弱原子运动速度对场熵演化的影响.当光场处于中间态，原子运动速度较低，且原子跃迁光子数较大时，光场与原子可以长久地处于量子纠缠态.

关键词: 量子光学, 运动原子, 二项式光场, 量子纠缠

Abstract:

The field entropy evolution of two moving atoms interacting with the binomial field in the multiphoton tavis-cumming model is studied. The influences of the atomic motion and the parameters of the binomial light field on the field entropy are discussed by means of the full quantum theory. The results indicate that the parameters of the binomial optical field are not influence the periodicity of the evolution of the field entropy, but it has effect on the value of the filed entropy. With the increase of the photon number of atomic transition, the periodicity of the evolution of the field entropy and the disentanglement were disappearing gradually. The speed of the moving atoms affects the periodicity of the evolution of the field entropy and the value of the entropy. But the increase the photon number of atomic transition will weaken the influence of the atomic motion on the field entropy. When the field is in the middle states, the speed of the atoms is lower and the photon number of atomic transition is larger, the binomial field and the two atoms will be entangled state for a long time.

Key words: quantum optics, quantum entanglement, moving atoms, binomial state field

包丽萨楚尔夫吴淑梅. 多光子Tavis-Cummings模型中运动原子与二项式光场相互作用的量子纠缠[J]. J4, 2010, 27(5): 580-585.

BAO Li Sachuerfu WU Shumei . Quantum entanglement of the binomial field interacting with the moving atoms in the multiphoton Tavis-Cummings model[J]. J4, 2010, 27(5): 580-585.

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