2010/02/28 by Bo Gao · 5 citations
Chemistry · Physics and Astronomy · #Advanced Frequency and Time Standards #Cold Atom Physics and Bose-Einstein Condensates #Spectroscopy and Laser Applications #physics.atom-ph #physics.chem-ph
paper · pdf · doi:10.1103/physrevlett.104.213201
published as Physical Review Letters 104, 213201 (2010) · 4 pages, 2 figures
openalex publication_date 2010/05/25 · arxiv created 2010/06/03 · arxiv updated 2010/06/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.