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arXiv 2009.00147physics.atom-ph
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光镊中双原子的对关联与光缔合动力学

Pair Correlations and Photoassociation Dynamics of Two Atoms in an Optical Tweezer

M. Weyland, S. S. Szigeti, R. A. B. Hobbs, P. Ruksasakchai, L. Sanchez, M. F. Andersen

摘要:

我们研究了两个激光冷却的$^{85}$ Rb原子在光镊中的光缔合动力学,揭示了多原子系综中光缔合的不同行为。我们观察到非指数衰减在我们的两个原子的实验,不能用一个单一的速率系数描述,并找到它的起源在我们的系统的对相关。这与多原子光缔合动力学形成鲜明对比,后者由具有单一速率系数的指数衰减控制。我们还研究了三原子体系中的光缔合,从而探索了从两原子动力学到多原子动力学的转变。我们的实验揭示了额外的反应动力学,只有通过控制单原子,并建议光缔合可以测量对相关性在少数原子系统。它进一步展示了我们对单个原子和分子的量子态的完全控制,这提供了从多原子实验中无法获得的信息。

英文摘要:

We investigate the photoassociation dynamics of exactly two laser-cooled $^{85}$Rb atoms in an optical tweezer and reveal fundamentally different behavior to photoassociation in many-atom ensembles. We observe non-exponential decay in our two-atom experiment that cannot be described by a single rate coefficient and find its origin in our system's pair correlation. This is in stark contrast to many-atom photoassociation dynamics, which are governed by exponential decay with a single rate coefficient. We also investigate photoassociation in a three-atom system, thereby probing the transition from two-atom dynamics to many-atom dynamics. Our experiments reveal additional reaction dynamics that are only accessible through the control of single atoms and suggest photoassociation could measure pair correlations in few-atom systems. It further showcases our complete control over the quantum state of individual atoms and molecules, which provides information unobtainable from many-atom experiments.

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