二分量BEC原子数密度在射频场作用下的崩塌与复苏现象  

Influence of rf frequency on long time evolution of the atomicity density's collapse and revival in two-component Bose-Einstein condensates

作　　者：刘志荣[1] 刘正东[1] 

机构地区：[1]南昌大学近代物理研究所,江西南昌330047

出　　处：《量子电子学报》2006年第4期484-488,共5页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(10464002和60278016)资助课题

摘　　要：研究射频场频率对二分量玻色-爱因斯坦凝聚体(BEC)原子数密度长时间演化特性的影响,研究结果显示当射频场频率较小而时间较长时BEC第二分量原子数密度的演化呈现出量子力学中典型的崩塌与复苏现象;原子数密度在更长时间的动力学行为中,若射频场频率增大,则呈现出崩塌与复苏现象的原子数密度震荡曲线整体逐渐下降．The influence of rf （radio frequency） frequencies on long time evolution of atomicity density of two-component Bose-Einstein condensations is studied. The results demonstrate that the atomicity density of BEC presents a quantum collapse and revival（C-R） , which is typical in quantum mechanics when the rf frequency is small enough and the time is fairly long. When the rf frequencies increased and the time prolonged, the oscillation curve of C-R declines as a whole with time.

关 键 词：量子光学 崩塌与复苏 二分量玻色-爱因斯坦凝聚体 射频场 长时间 

分 类 号：O431.2[机械工程—光学工程]