摘要
本文考虑原子和腔场存在衰减的情况,研究了耦合腔系统中两子系统间的几何量子失谐。在原子和腔场衰减系数相等的特殊情况下,通过解薛定谔方程,给出了系统态矢演化规律。采用数值计算方法,讨论了原子和腔场衰减对两子系统间几何量子失谐的影响。研究结果表明:两原子间、两腔场间、以及原子和腔场之间的几何量子失谐都呈现出振幅衰减式振荡,直至衰减至零;并且,随衰减系数增大,衰减加快。
The geometrical quantum discords betwe en two subsystems in the coupled-cavity system are studied when there are the a tom-decay and the cavity-decay.Under the special condition that atomic decay r ate equals to the decay rate of cavity field,the evolution of the system state v ector is given.The effects of the atom-decay and the cavity-decay on the geome trical quantum discords are discussed.Numerical results show that the geometrica l quantum discords between two atoms,between two cavities,as well as between ato m and cavity all exhibit damping oscillation behavior until they decay to zero.O n the other hand,the decays of these geometrical quantum discords are all accele rated with the increase of decay rate.
作者
卢永祥
卢道明
LU Yong-xiang;LU Dao-ming(Information Technology and Laboratory Management Center;College of Mechanic and Electronic Engineering,Wuyi University,Wuyishan 354300,China)
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2021年第1期64-69,共6页
Journal of Optoelectronics·Laser
基金
福建省自然科学基金项目(2015J01020)。
关键词
量子光学
原子衰减
腔场衰减
耦合腔
几何量子失谐
quantum optics
atom-decay
cavity-decay
coupled-cavity
geometrical quantum discord
