高Q腔中Stark效应对两原子纠缠的影响

J4 ›› 2009, Vol. 26 ›› Issue (3): 313-319.

高Q腔中Stark效应对两原子纠缠的影响

邢晋晶王中结张侃

安徽师范大学物理与电子信息学院, 安徽芜湖 241000

收稿日期:2008-07-04 修回日期:2008-07-21 出版日期:2009-05-28 发布日期:2009-05-07
通讯作者: 王中结(1962-),男,教授, 安徽潜山人,硕士生导师, 主要从事量子混沌和量子光学方向的研究. E-mail: wuliwzj@mail.ahnu.edu.cn
作者简介:邢晋晶(1983-),女,安徽芜湖人,安徽师范大学硕士研究生,主要从事量子光学方向的研究,E-mail:jin-005@sohu.com
基金资助:
安徽省教育厅自然科学基金(KJ2008A029)

Influence of Stark effect on entanglement of two-atom inside a high-Q cavity

XING Jin-Jing, WANG Zhong-Jie, ZHANG Kan

College of physics and Electronic Information, Anhui Normal University, Wuhu 241000, China

Received:2008-07-04 Revised:2008-07-21 Published:2009-05-28 Online:2009-05-07

摘要/Abstract

摘要：

利用共生纠缠度标准, 研究了存在效应情况下,两个纠缠二能级原子与相干光场相互作用的纠缠动力学.分析了效应耦合系数对系统纠缠动力学的影响.结果表明: 效应的耦合系数对两原子间纠缠度的时间演化特性有着很大影响.当效应耦合系数很小时,两个原子间纠缠度的时间演化特性呈现周期性纠缠和退纠缠现象;当效应耦合系数很大时,原子间退纠缠现象消失,即原子始终保持在纠缠状态.

关键词: 纠缠动力学, 相干光场, 共生纠缠度, Stark效应

Abstract:

The entanglement dynamics of two entangled two-level atoms interacting with a coherent light field is investigated by means of the standard of entanglement concurrence. The influences of the coupling coefficient of Stark effect on the entanglement dynamics of the system are discussed. The calculating results show that the time evolution of two-atom entanglement is influenced by the coupling coefficient of Stark effect. The time evolution of two-atom entanglement displays periodic entanglement and disentanglement when the coupling coefficient of Stark effect is much smaller, while the disentanglement will disappear when the coupling coefficient of Stark effect is much larger. That is to say the statement of entanglement can be preserved preferably.

Key words: entanglement dynamics, coherent light field, concurrence, Stark effect

中图分类号:

O431.2

邢晋晶王中结张侃. 高Q腔中Stark效应对两原子纠缠的影响[J]. J4, 2009, 26(3): 313-319.

XING Jin-Jing, WANG Zhong-Jie, ZHANG Kan. Influence of Stark effect on entanglement of two-atom inside a high-Q cavity[J]. J4, 2009, 26(3): 313-319.

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