Universal properties in ultracold ion-atom interactions.
Universal properties in ultracold ion-atom interactions.
复制标题
DOI：
10.1103/physrevlett.104.213201
复制
发表时间：
2010-02
影响因子：
8.6
通讯作者：
B. Gao
中科院分区：
文献类型：
--
作者：
B. Gao
我们给出了离子-原子相互作用的一些普遍性质，这些性质来自于一个新形成的量子亏损理论，该理论适用于-1/R4型长程相互作用。对于束缚态，我们给出了离子-原子系统的普适束缚谱，即相当于里德堡公式的束缚谱。对于散射，我们引入了普遍共振谱的概念，以系统地理解离子-原子散射中存在的许多共振。该理论进一步提供了一种准确测定原子极化率的光谱方法。它还暗示了原子状分子的存在，在这种分子中，多个原子围绕一个重离子运行。
We present some of the universal properties in ion-atom interaction derived from a newly formulated quantum-defect theory for the -1/r4 type of long-range interactions. For bound states, we present the universal bound spectrum, namely, the equivalent of the Rydberg formula, for ion-atom systems. For scattering, we introduce the concept of a universal resonance spectrum to give a systematic understanding of many resonances present in ion-atom scattering. The theory further provides a method for an accurate spectroscopic determination of the atomic polarizability. It also suggests the existence of atomlike molecules, in which multiple atoms orbit around a heavy ion.