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作 者:卿嘉阳 邬云文[1] QING Jiayang;WU Yunwen(College of Physics and Electromechanical Engineering,Jishou University,Jishou 416000,Hunan China)
机构地区:[1]吉首大学物理与机电工程学院,湖南吉首416000
出 处:《吉首大学学报(自然科学版)》2023年第6期44-49,共6页Journal of Jishou University(Natural Sciences Edition)
基 金:国家自然科学基金资助项目(12165009);吉首大学校级科研资助项目(JDY21036)。
摘 要:运用全量子理论的方法分析了三能级原子与光场相互作用系统,并基于波函数研究了同一耦合强度下不同量子态的动力学演化特性,进一步探讨了同一量子态不同耦合强度对系统动力学演化特性的影响.在同一耦合强度下,原子在|b 1态的布居值随着时间的增加呈现出先减小后增大的趋势,原子处于|b 2态与|b 3态的布居值随着时间的延长呈现出先增大后减小的趋势;|b 2态所对应的布居值在同一个周期内产生3个峰,|b 3态所对应的布居值在同一个周期内产生2个峰,且在第1个峰值之后还产生了1个低谷;不同量子态的布居值均随着时间的推移呈现出周期性振荡规律.在同一量子态下,随着耦合系数的增大,光场与原子间量子态的动力学演化振荡特性逐渐增强,系统动力学演化图形始终随着时间的增加而保持周期变化.The system of three-level atom interacting with light field is studied by using the method of full quantum theory.Based on wave function,the dynamic evolution characteristics of different quantum states with the same coupling intensity are studied.In addition,the influence of different coupling intensity of the same quantum state on the dynamic evolution characteristics of the system is discussed.The results show that under the same coupling intensity,the population values of atoms in|b 1 states first decrease and then increase with time,the population values of atoms in|b 2 states and|b 3 states first increase and then decrease with time,and the corresponding population values of|b 2 states produce three peaks in the same period.The population values corresponding to the|b 3 states produce two peaks in the same period,and there is also a trough after the first peak,and the population values of different quantum states show periodic oscillations with time.In the same quantum state,with the increase of the coupling coefficient,the dynamic evolution oscillation characteristics of the quantum state between the light field and atoms are enhanced,and the system dynamic evolution pattern always maintains periodic changes with the increase of time.
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