玻色-爱因斯坦凝聚体中的离心效应
Centrifugal Effects in a Bose-Einstein Condensate
摘要：
利用含时的瞬态囚禁势，在旋转磁场作用下的原子阱中得到了单粒子态。这些国家相比，有效的时间平均潜力。我们表明，陷阱是可能的，当旋转的频率超过一定的阈值。略高于这个阈值，被囚禁原子的弱相互作用气体在与场一起旋转的坐标系中获得准一维系统的性质。讨论了原子-原子相互作用在改变理想气体溶液中的作用。我们表明，在大量的粒子的限制，其角频率被适当调制的旋转场可以被用来作为一个驱动力，主要用于质心运动以及角动量$L = 2$正常模式的玻色凝聚。分析了旋转场强迫量子蒸发的机制。
英文摘要：
Single particle states in the atomic trap employing the rotating magnetic field are found using the full time-dependent instantaneous trapping potential. These states are compared with those of the effective time-averaged potential. We show that the trapping is possible when the frequency of the rotations exceeds some threshold. Slightly above this threshold the weakly interacting gas of the trapped atoms acquires the properties of a quasi-1D system in the frame rotating together with the field. The role of the atom-atom interaction in changing the ideal gas solution is discussed. We show that in the limit of large numbers of particles the rotating field whose angular frequency is appropriately modulated can be utilized as a driving force principally for the center of mass motion as well as for the angular momentum $L = 2$ normal modes of the Bose condensate. A mechanism of quantum evaporation forced by the rotating field is analyzed.
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