Population of closed-channel molecules in trapped Fermi gases with broad feshbach resonances

被引：20
作者：
Chen, QJ
Levin, K
机构：
[1] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA
[2] Univ Chicago, Dept Phys, Chicago, IL 60637 USA
来源：
PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 26期
关键词：
D O I：
10.1103/PhysRevLett.95.260406
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We compute the fraction of closed-channel molecules in trapped atomic Fermi gases, over the entire range of accessible fields and temperatures. We use a two-channel model of Bardeen-Cooper-Schrieffer-Bose-Einstein-condensation crossover theory at general temperature T, and show that this fraction provides a measure of the T-dependent pairing gap. Our calculations, containing no free parameters, are in good quantitative agreement with recent low-T measurements in Li-6. We present readily testable predictions for the dependencies of the closed-channel fraction on temperature and Fermi momentum.
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