Chen Qijin, Levin K
James Franck Institute and Department of Physics, University of Chicago, Illinois 60637, USA.
Phys Rev Lett. 2005 Dec 31;95(26):260406. doi: 10.1103/PhysRevLett.95.260406. Epub 2005 Dec 28.
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 , 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- measurements in (6)Li. We present readily testable predictions for the dependencies of the closed-channel fraction on temperature and Fermi momentum.
我们计算了捕获的原子费米气体中封闭通道分子的比例，涵盖了可及场和温度的整个范围。我们在一般温度下使用巴丁 - 库珀 - 施里弗 - 玻色 - 爱因斯坦凝聚交叉理论的双通道模型，并表明该比例提供了与温度相关的配对能隙的一种度量。我们的计算不包含自由参数，与近期对（6）Li的低温测量结果在定量上吻合良好。我们给出了封闭通道比例对温度和费米动量依赖性的易于检验的预测。
