场-原子耦合系统强度与时间依赖的场熵演化

量子电子学报 ›› 2020, Vol. 37 ›› Issue (2): 215-221.

场-原子耦合系统强度与时间依赖的场熵演化

刘王云¹,潘聪逸¹,杨志勇²,段存丽¹

1西安工业大学光电工程学院，陕西西安 710021； 2西安电子科技大学物理与光电工程学院，陕西西安 710071

收稿日期:2019-07-03 修回日期:2019-09-16 出版日期:2020-03-28 发布日期:2020-03-28
通讯作者: 刘王云 E-mail:312229964@qq.com
作者简介:刘王云（1975-），女，山西闻喜人，博士，副教授，硕士生导师，主要从事光电信息处理与技术，量子光学与量子信息学以及激光技术方面的研究。Email: 312229964@qq.com
基金资助:
Supported by Shaanxi Science and Technology Development Fund (陕西省科技厅项目, 2019JQ316)

Evolution of the intensity- and time-dependent field quantum entropy of the field-atom coupled system

LIU Wangyun1， PAN Congyi1， YANG Zhiyong2， DUAN Cunli1

1 School of Optoelectronic Engineering, Xi’an Technological University, Xi’an 710021, China; 2 School of Physics and Optoelectronic Engineering，Xidian University, Xi'an 710071，China

Received:2019-07-03 Revised:2019-09-16 Published:2020-03-28 Online:2020-03-28
Contact: LIU Wangyun E-mail:312229964@qq.com

摘要/Abstract

摘要： 利用Von Neumann量子约化熵理论，研究了共振情况下场与原子之间耦合随时间和强度变化时，L型三能级原子与单模场相互作用系统中量子场熵的演化特性，通过数值计算详细讨论了不同初始光场和耦合系数变化的快慢对量子场熵的影响。结果表明：初始光场统计性质的不同将使系统的量子场熵演化发生较大变化，耦合强度调制函数的变化将改变量子场熵演化曲线的振荡频率，场与原子相互作用的初始阶段是一个逐渐耦合的过程，原子叠加态概率使量子场熵周期性地发生改变。

关键词: 量子光学, 量子场熵演化, 依赖强度与时间耦合, Von Neumann量子约化熵理论, 型三能级原子

Abstract: Based on the Von Neumann quantum reduced entropy theory, the evolution properties of field quantum entropy in the interaction system of L-type three-level atom and single-model field are studied when the coupling between the field and the atom changes with time and intensity under the on-resonance condition . The influences of the different initial fields and the changes of the coupling coefficient on the field quantum entropy is discussed in detail through numerical calculation. The results show that the different statistical properties of the initial fields will lead to the great variation of the field quantum entropy, and the changes of the coupling strength modulation function will change the oscillating frequency of the evolution of the field quantum entropy. In addition, it is shown that the initial stage of the interaction between the field and the atom is a gradually coupled procedure, and the superposition state probability of the atom makes the field quantum entropy change periodically.

Key words: quantum optics, evolution of field quantum entropy；intensity-dependent and time-dependent coupling, Von Neumann quantum reduced entropy theory, L-type three-level atom

中图分类号:

O431.2

刘王云, 潘聪逸, 杨志勇, 段存丽. 场-原子耦合系统强度与时间依赖的场熵演化[J]. 量子电子学报, 2020, 37(2): 215-221.

LIU Wangyun, PAN Congyi, YANG Zhiyong, DUAN Cunli. Evolution of the intensity- and time-dependent field quantum entropy of the field-atom coupled system[J]. Chinese Journal of Quantum Electronics, 2020, 37(2): 215-221.

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