与级联三能级原子相互作用的二项式态光场的量子特性

量子电子学报 ›› 2020, Vol. 37 ›› Issue (1): 76-82.

与级联三能级原子相互作用的二项式态光场的量子特性

丛红璐1, 赵玉娜1, 陈雷1, 王林杰1, 任学藻2

1北京交通大学海滨学院，河北黄骅 061199； 2西南科技大学理学院，四川绵阳 621010

收稿日期:2019-07-03 修回日期:2019-07-23 出版日期:2020-01-28 发布日期:2020-01-28
通讯作者: 丛红璐 E-mail:conghonglu@163.com
作者简介:丛红璐（1984-），辽宁锦州人，研究生，副教授，主要从事量子光学方面的研究。E-mail：conghonglu@163.com
基金资助:
Supported by National Natural Science Foundation of China(国家自然科学基金，11804136)，Higher Education Reform and Practice Project in Hebei Province(河北省高等教育教学改革与实践项目, 2018GJJG649）， Construction Project for Experimental Teaching Demonstration Center of Hebei Province（河北省实验教学示范中心建设项目）

Quantum Properties of Binomial State Field Interacting with the Cascade Three-Level Atom

CONG Honglu1, ZHAO Yuna1, CHEN Lei1, WANG Linjie1, REN Xuezao2

1 Haibin College, Beijing Jiaotong University, Huanghua 061199, China; 2 School of Science, Southwest University of Science and Technology, Mianyang 621010, China

Received:2019-07-03 Revised:2019-07-23 Published:2020-01-28 Online:2020-01-28

摘要/Abstract

摘要： 在非旋波近似，对级联型三能级原子与单模二项式态光场相互作用的能谱以及二阶相干度进行了精确求解。利用保真度对能级的交叉问题进行了讨论，研究了二项式态光场参数及原子初始状态对光场二阶相干度的影响。数值计算结果表明：随着光场参数η的增大光场呈现聚束效应的持续时间逐渐减小，初始时刻原子能级的叠加使得光场呈现反聚束效应持续时间明显减少,当η值足够大时，无论原子初始时刻处于何种状态光场都将完全呈现反聚束效应。由于非旋波项产生的虚光子效应,二阶相干度演化曲线出现小锯齿状振荡。

关键词: 量子光学, 能谱, 保真度, 反聚束效应, 非旋波近似

Abstract: The energy spectrum and second-order coherence degree of a cascade three-level atom interacting with a single mode binomial state field were calculated exactly in the non-rotating wave approximation. The level-crossing problem was discussed by using fidelity. The influences of the binomial state fields parameter η and the superposition of atomic energy levels at the initial time on the second-order coherence degree were studied. The results indicate that the duration of the bunching effect decreases gradually with the increase of light field parameter η . The duration of the light field present antibunching effect decreases due to the atom in the superposition state. Whether the atom is in superposition state at the beginning time, the light field displays antibunching effect completely when the value of η is big enough. Because of the virtual photon effect induced by non-rotating wave approximation, the little indentation oscillation appeared in the second-order coherence degree evolution curves.

Key words: quantum optics, energy spectrum, fidelity, antibunching effect, non-rotating wave approximation

中图分类号:

O431.2

丛红璐赵玉娜陈雷王林杰任学藻. 与级联三能级原子相互作用的二项式态光场的量子特性[J]. 量子电子学报, 2020, 37(1): 76-82.

CONG Honglu, ZHAO Yuna, CHEN Lei, WANG Linjie, REN Xuezao . Quantum Properties of Binomial State Field Interacting with the Cascade Three-Level Atom[J]. Chinese Journal of Quantum Electronics, 2020, 37(1): 76-82.

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