Landau-Zener模型中纠缠演化及转移的研究

J4 ›› 2015, Vol. 32 ›› Issue (6): 691-698.

Landau-Zener模型中纠缠演化及转移的研究

王海峰张英杰

1 日照职业技术学院，山东日照，276826；2 山东省激光偏光与信息技术重点实验室, 曲阜师范大学物理系, 山东曲阜, 273165

收稿日期:2014-12-09 修回日期:2015-01-03 出版日期:2015-11-28 发布日期:2015-11-05
通讯作者: 王海峰（1981-），山东泰安人，讲师，硕士，从事激光与物质相互作用的研究。 E-mail:yingjiezhang2007@163.com
基金资助:
国家自然科学基金项目资助课题(11304179, 11247240)，山东省自然科学基金项目资助课题（ZR2012FQ024）

Entanglement Evolution and Transfer in Landau-Zener Model

Wang Hai-Feng, Zhang Ying-Jie

1. Rizhao Polytechnic, Rizhao, 276826, China；2. Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Department of Physics, Qufu Normal University, Qufu , 273165, China

Received:2014-12-09 Revised:2015-01-03 Published:2015-11-28 Online:2015-11-05

摘要/Abstract

摘要：

研究了受外场驱动的两个二能级系统分别与两个单模量子化光场相互作用模型中纠缠演化及转移问题。该工作主要是对外场驱动的Landau-Zener模型进行了研究，采用旋转波近似的方法，通过数值计算详细分析了二能级系统初始状态、能级间的耦合常数以及驱动外场的参数对子系统间纠缠和转移特性的影响。结果表明，适当调节模型中的参数，可以使系统初始纠缠完全转移为光腔场间的纠缠，实现二能级系统与光场间的最大纠缠转移。

关键词: 量子光学, 量子纠缠, 共生纠缠, Landau-Zener模型

Abstract:

The entanglement dynamical behaviors of two two-level systems, which respectively interact with a single-mode quantum light-cavity field, are investigated. The Landau-Zener model driven by the classical outfield is studied. By means of the transformed rotating-wave approximation (TRWA ), we analyze the effects of the initial entanglement, the coupling strength between two levels and the parameter of the classical outfield on the entanglement evolution and transfer of two two-level systems, by making numerical calculation. The result shows that when we choose the appropriate condition, the initial entanglement can be perfectly transferred into the light-cavity fields. So the biggest entanglement transfer between the two-level systems and light-cavity fields would be realized easily.

Key words: quantum optics, quantum entanglement, concurrence, Landau-Zener model

王海峰张英杰 . Landau-Zener模型中纠缠演化及转移的研究[J]. J4, 2015, 32(6): 691-698.

Wang Hai-Feng, Zhang Ying-Jie. Entanglement Evolution and Transfer in Landau-Zener Model[J]. J4, 2015, 32(6): 691-698.

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