用激光按需提取原子
Extracting Atoms on Demand with Lasers
摘要：
我们提出了一个方案，允许相干提取冷原子从水库中的确定性的方式。这种转移是通过辐射脉冲耦合两个原子态来实现的，这两个原子态是不同捕获条件的对象。提出了一种特殊的实现，其中一个状态具有零磁矩，并由偶极陷阱限制，而具有非零磁矩的其他状态由陡峭的微陷阱电位限制。我们表明，在这种设置中，预定数量的原子可以从一个水库，一个玻色-爱因斯坦凝聚体，到集体量子态的陡峭的陷阱，在目前的实验参数制度的高效率。
英文摘要：
We propose a scheme that allows to coherently extract cold atoms from a reservoir in a deterministic way. The transfer is achieved by means of radiation pulses coupling two atomic states which are object to different trapping conditions. A particular realization is proposed, where one state has zero magnetic moment and is confined by a dipole trap, whereas the other state with non-vanishing magnetic moment is confined by a steep microtrap potential. We show that in this setup a predetermined number of atoms can be transferred from a reservoir, a Bose-Einstein condensate, into the collective quantum state of the steep trap with high efficiency in the parameter regime of present experiments.
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