Tavis-Cummings模型中运动原子的量子关联动力学

J4 ›› 2016, Vol. 33 ›› Issue (2): 208-214.

Tavis-Cummings模型中运动原子的量子关联动力学

高德营,王付军

聊城大学东昌学院，山东聊城 252000

收稿日期:2015-04-08 修回日期:2015-05-18 出版日期:2016-03-28 发布日期:2016-03-28
通讯作者: 高德营(1980-)，山东阳谷人，讲师，博士生，从事量子光学和量子信息的研究。 E-mail:gaodeying@126.com
基金资助:
国家自然科学基金资助课题（61178012），山东省高等学校科技计划项目(J14LN87),聊城大学东昌学院科研项目

Quantum Correlation Dynamics of Motive Atoms in Tavis-Cummings Model

GAO Deying, Wang Fujun

Dongchang College of Liaocheng University, Liaocheng 252000, China

Received:2015-04-08 Revised:2015-05-18 Published:2016-03-28 Online:2016-03-28

摘要/Abstract

摘要： 通过数值计算的方法，研究了T-C模型中两运动原子与粒子场相互作用时两原子的量子关联。讨论了两原子的初始量子纠缠和腔场的光子数及原子的运动对两原子量子纠缠和量子失谐的影响。结果表明：初始量子纠缠不同，两原子的量子纠缠和量子失谐的演化不同；光子数的增加，两原子的量子纠缠出现猝死和恢复现象，而量子失谐保持非零，同时量子纠缠和量子失谐变化的更快；考虑原子的运动时，量子纠缠和量子失谐周期性演化，场模结构参数的增大，量子纠缠和量子失谐的演化周期变小。通过演化曲线发现，量子纠缠和量子失谐的演化具有相似性。

关键词: 量子光学；量子失谐；Concurrence；量子关联

Abstract: By using the method of numerical calculation, the quantum correlation dynamics of two Motive atoms is investigated in Tavis-Cummings Model in which two motive atoms interact with the Fock state field. The effects of the initial entanglement of the two atoms and the number of Fock state field and the atomic movement on the entanglement and quantum discord are analyzed. The results show initial entanglement is different, the time evolution of atoms’ quantum entanglement and quantum discord is different; with the increase of the number of photon, the phenomenon of sudden death and birth of quantum entanglement between two atoms occurs, while quantum discord keeps nonzero and the time evolution of quantum entanglement and quantum discord becomes faster; atomic movement can make quantum entanglement and quantum discord have a periodic evolution and the increase of the field model structure parameter can make the period of quantum entanglement and quantum discord be shorter. It is found that quantum entanglement and quantum discord are similar by the time evolution curves.

Key words: Quantum optics; Quantum discord; Concurrence; Quantum correlation

中图分类号:

O431

高德营王付军. Tavis-Cummings模型中运动原子的量子关联动力学[J]. J4, 2016, 33(2): 208-214.

GAO Deying, Wang Fujun. Quantum Correlation Dynamics of Motive Atoms in Tavis-Cummings Model[J]. J4, 2016, 33(2): 208-214.

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