期刊
PHYSICAL REVIEW A
卷 79, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.79.013622
关键词
binding energy; caesium; resonant states
资金
- Austrian Science Fund
- Lise Meitner program of the FWF
- ARO [W911NF0710576]
- DARPA OLE Program
- NSF-MRSEC program [DMR0213745]
- Packard foundation
We present an analytic model to calculate the atomic scattering length near a Feshbach resonance from data on the molecular binding energy. Our approach considers finite-range square-well potentials and can be applied near broad, narrow, or even overlapping Feshbach resonances. We test our model on Cs-2 Feshbach molecules. We measure the binding energy using magnetic-field modulation spectroscopy in a range where one broad and two narrow Feshbach resonances overlap. From the data we accurately determine the Cs atomic scattering length and the positions and widths of two particular resonances.
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