摘要
计算了耗散腔中两个非全同原子与光场在大失谐相互作用下原子的密度算符间距,并讨论了不同平均光子数、腔场衰减系数以及不同耦合系数之比对原子密度算符间距的影响。结果表明:在耗散腔中,原子的密度算符间距开始呈减幅振荡,经一段时间后呈等幅周期振荡。随两原子耦合系数比增大,原子态密度算符间距的振荡剧烈程度和周期均减小,振幅增大,当腔场的衰减系数增大时,其达等幅振动所用时间迅速缩短;但随光场平均光子数增加其振荡幅度减小。
The distance between density operators of the atoms is calculated in a dissipative cavity under the large detuning limit.It is affected by the different average photon number,damping coefficient,the ratio of coupling coefficients.The results show that the distance between density operators of atoms fluctuates damply and periodically then it fluctuates with equal amplitude.With the increasing of the mean photons number,the ratio of coupling coefficients and damping coefficient,the period of the distance between density operators of atom is decreasing,the time for arriving at equal amplitude fluctuation is shortening and the amplitude of fluctuation is decreasing.
出处
《兴义民族师范学院学报》
2011年第6期93-95,共3页
Journal of Minzu Normal University of Xingyi
关键词
量子光学
耗散腔
密度算符间距
非全同双原子
主方程
Quantum optics
damping cavity
distance between density operators
two-atom system
master equation
