论文标题
浸入Bose-Einstein冷凝物中的单个冷离子的非弹性碰撞动力学
Inelastic collision dynamics of a single cold ion immersed in a Bose-Einstein condensate
论文作者
论文摘要
我们研究了玻色网凝结物中单个冷离子的非弹性碰撞动力学。我们观察到快速的离子原子 - 原子三体重组，导致形成弱结合的分子离子，然后是继发性两体分子 - 原子碰撞，使旋转状态触发了更深的结合能。与以前利用杂种离子陷阱的研究相反，我们在有效的无现场环境中工作，并通过Rydberg的激发和电离直接从原子质集合中产生自由的低能离子杂质。这使我们能够实施一种能量分辨的场分解技术，以追踪重组产品的松弛动力学。我们的观察结果与基于langevin捕获动力学的数值模拟非常吻合，并提供了研究超速量子气体中离子杂质的稳定性和反应动态的补充方法。
We investigate inelastic collision dynamics of a single cold ion in a Bose-Einstein condensate. We observe rapid ion-atom-atom three-body recombination leading to formation of weakly bound molecular ions followed by secondary two-body molecule-atom collisions quenching the rovibrational states towards deeper binding energies. In contrast to previous studies exploiting hybrid ion traps, we work in an effectively field-free environment and generate a free low-energy ionic impurity directly from the atomic ensemble via Rydberg excitation and ionization. This allows us to implement an energy-resolved field-dissociation technique to trace the relaxation dynamics of the recombination products. Our observations are in good agreement with numerical simulations based on Langevin capture dynamics and provide complementary means to study stability and reaction dynamics of ionic impurities in ultracold quantum gases.
