捕陷原子在大失谐双色场中的量子崩塌-回复特性

CHARACTERISTIC OF QUANTUM COLLAPSE AND REVIVAL IN THE MOTION OF A TRAPPED ATOM FOR HIGH DETUNING

分析了捕陷的二能级原子在大失谐条件下与驻波光场和行波光场共同作用时的动力学 .原子的量子平均能量随时间的变化呈现崩塌 回复的特征 ,表明这个系统的振动态具有压缩效应 .系统的非线性 (参数 μ)越大 ,崩塌 回复的频率越大 ,离子的量子平均能量越小 .随着行波场强的增大 ,冷却原子的振动态压缩效应愈显著 .

In this paper the quantum dynamics of the trapped atom which acts with a standing light field and a travelling light field is investigated. Evolution of the quantum mean energy of the ion with time displays the characteristic of collapse\|revival which implies that the vibration states of the system have squeezing effect. The larger the nonlinearity of the system, the higher the frequency of collapse\|revival of the system, and the smaller the quantum mean energy of the ion. The higher the intensity of the travelling light field, the higher the degree of squeezing of the vibration states of the system can be observed.