Observation of collisions between cold Li atoms and Yb+ ions
Observation of collisions between cold Li atoms and Yb+ ions
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冷Li原子与Yb离子碰撞的观察
DOI：
10.1103/physreva.96.030703
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发表时间：
2017
影响因子：
2.9
通讯作者：
R. Gerritsma
中科院分区：
文献类型：
--
作者：
J. Joger;H. Fürst;N. Ewald;T. Feldker;M. Tomza;R. Gerritsma
我们报道了原子和离子之间冷碰撞的观测结果。由于其大的质量比，这种物种的组合最近被认为是最适合在混合原子-离子系统中达到量子极限的。对于基态制备的原子和离子，电荷转移和缔合率至少比朗之万撞率小一倍。这些结果证实了共振冷却和量子信息应用的良好前景。对于处于激发电子态的离子，我们发现反应速率是由电荷转移控制的，而不依赖于离子同位素或碰撞能。基态碰撞的低电荷转移率在理论上得到了证实，但离子中的这一因素阻碍了对…和态的电荷转移率的准确预测。用量子化学的从头算方法，计算了能量以下的原子-离子相互作用势，并用它们定性地解释了观察到的速率。
We report on the observation of cold collisions betweenatoms andions. This combination of species has recently been proposed as the most suitable for reaching the quantum limit in hybrid atom-ion systems, due to its large mass ratio. For atoms and ions prepared in theground state, the charge-transfer and association rate is found to be at leasttimes smaller than the Langevin collision rate. These results confirm the excellent prospects offor sympathetic cooling and quantum information applications. For ions prepared in the excited electronic states, and, we find that the reaction rate is dominated by charge transfer and does not depend on the ionic isotope or the collision energy in the range. The low charge-transfer rate for ground-state collisions is corroborated by theory, but theshell in theion prevents an accurate prediction for the charge-transfer rate of the, andstates. Usingab initiomethods of quantum chemistry we calculate the atom-ion interaction potentials up to energies of, and use these to give qualitative explanations of the observed rates.
影响因子：
56.9
作者：
Serwane, F.;Zuern, G.;Jochim, S.
通讯作者：
Jochim, S.