静电、交流和微波阱中分子的交感冷却展望
Prospects for sympathetic cooling of molecules in electrostatic, ac and microwave traps
摘要：
我们考虑如何被困分子可以被超冷原子同情冷却。作为一个原型系统，我们研究了LiH分子与超冷Li原子的共囚禁。我们计算了LiH + Li与初始处于基态和第一旋转激发态的分子的弹性和非弹性碰撞截面。然后，我们使用这些截面来模拟在静电阱，交流电阱和微波阱的交感冷却。在静态陷阱中，我们发现，非弹性损失太大，冷却是可行的，这个系统。交流和微波陷阱限制了基态分子，因此抑制了非弹性损耗。然而，在交流陷阱中的碰撞可以使分子从稳定的轨道变为不稳定的轨道，因此共振冷却伴随着陷阱损失。在微波阱中，没有这种损失，并且应该可以进行共振冷却。
英文摘要：
We consider how trapped molecules can be sympathetically cooled by ultracold atoms. As a prototypical system, we study LiH molecules co-trapped with ultracold Li atoms. We calculate the elastic and inelastic collision cross sections of LiH + Li with the molecules initially in the ground state and in the first rotationally excited state. We then use these cross sections to simulate sympathetic cooling in a static electric trap, an ac electric trap, and a microwave trap. In the static trap we find that inelastic losses are too great for cooling to be feasible for this system. The ac and microwave traps confine ground-state molecules, and so inelastic losses are suppressed. However, collisions in the ac trap can take molecules from stable trajectories to unstable ones and so sympathetic cooling is accompanied by trap loss. In the microwave trap there are no such losses and sympathetic cooling should be possible.
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