非旋波近似下薛定谔猫态光场与V型三能级原子相互作用系统的量子特性

J4 ›› 2015, Vol. 32 ›› Issue (3): 306-314.

非旋波近似下薛定谔猫态光场与V型三能级原子相互作用系统的量子特性

李鹏茂，萨楚尔夫，苏少龙

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:2014-04-15 修回日期:2014-09-04 出版日期:2015-05-28 发布日期:2015-05-28
通讯作者: 萨楚尔夫（1962—）蒙古族，内蒙古呼和浩特人，内蒙古师范大学教授，博士，主要从事量子光学研究 E-mail:Sacrf@imnu.edu.cn.

Quantum properties in a system interacting a V type three-level atom with Schr?dinger cat state

Li Peng-mao, Sachuerfu, Su Shao-long

1.College of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot 010022, China
2. Library of Inner Mongolia Normal University, Hohhot 010022, China)

Received:2014-04-15 Revised:2014-09-04 Published:2015-05-28 Online:2015-05-28

摘要/Abstract

摘要：

在非旋波近似下，通过采用相干态正交展开的方法，对薛定谔猫态光场与V型三能级原子相互作用的量子特性进行了研究。首先，精确求解了V型三能级的能谱，并判断了系统的保真度。其次，演化问题的结果表明：当原子初态处于基态时，随着初始光场强度的增大，奇相干态和偶相干态的二阶相干度的振幅都减小，且表现出聚束效应与反聚束效应的临界状态。当原子初态处于叠加态时，随着初始光场强度的增大奇相，奇干态和偶相干态的二阶相干度的振幅都减小，且表现出聚束效应。最后，当系统耦合系数减小，光场二阶相干度的振荡幅度减小，光场呈现反聚束效应。

关键词: 薛定谔猫态非旋波近似反聚束效应保真度

Abstract:

Applying the method of coherent states orthogonalization expansion, quantum properties in a system interacting a V type three-level atom with Schr?dinger cat state is studied without rotating wave approximation (RWA). Firstly, the energy spectrum of the V type three-level atom is calculated precisely, and the fidelity of the system is estimated. Secondly, when the atom initially is in the ground state，the amplitude of the second order coherence degrees of the odd or even coherent state decreases and the light field shows bunching effect and antibunching effect alternately with the original strength of light field increasing. Similarly, when the atom initially stays in a superposition state, the amplitude of the second order coherence degrees of the odd or even coherent state decreases and the light field shows bunching effect only with the original strength of light field increasing. Finally, as the coupling coefficient decreases, the amplitude of the second order coherence degrees decreases and the light field shows antibunching effect.

Key words: Schrodinger cat state, antibunching effect, fidelity

中图分类号:

0431.2

李鹏茂，萨楚尔夫，苏少龙. 非旋波近似下薛定谔猫态光场与V型三能级原子相互作用系统的量子特性[J]. J4, 2015, 32(3): 306-314.

Li Peng-mao, Sachuerfu, Su Shao-long. Quantum properties in a system interacting a V type three-level atom with Schr?dinger cat state[J]. J4, 2015, 32(3): 306-314.

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