Universal properties in ultracold ion-atom interactions

Details Universal properties in ultracold ion-atom interactions Universal properties in ultracold ion-atom interactions

2010-02-04

arxiv.org/abs/1002.1022v2

Physical Review Letters 104, 213201 (2010)

Physics

Atomic Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.104.213201

We present some of the universal properties in ion-atom interaction derived from a newly formulated quantum-defect theory for $-1/r^4$ 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 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 atom-like molecules, in which multiple atoms orbit around a heavy ion.

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