Bragg spectroscopy of a strongly interacting Fermi gas.
Bragg spectroscopy of a strongly interacting Fermi gas.
复制标题
DOI：
10.1103/physrevlett.101.250403
复制
发表时间：
2008-09
影响因子：
8.6
通讯作者：
G. Veeravalli;E. Kuhnle;P. Dyke;C. Vale
中科院分区：
文献类型：
--
作者：
G. Veeravalli;E. Kuhnle;P. Dyke;C. Vale
用Bragg光谱研究了费米子6Li中玻色-爱因斯坦凝聚到Bardeen-Cooper-Schrieffer(BEC-BCS)的交叉。观察到了从分子光谱到原子光谱的平稳转变，并有明显的一元性配对特征。这些光谱探测了气体的动态和静态结构因素，并提供了与二体关联的直接联系。我们已经表征了这些关联，并测量了它们在834G的宽Feshbach共振范围内的密度依赖性。
We present a comprehensive study of the Bose-Einstein condensate to Bardeen-Cooper-Schrieffer (BEC-BCS) crossover in fermionic 6Li using Bragg spectroscopy. A smooth transition from molecular to atomic spectra is observed with a clear signature of pairing at and above unitarity. These spectra probe the dynamic and static structure factors of the gas and provide a direct link to two-body correlations. We have characterized these correlations and measured their density dependence across the broad Feshbach resonance at 834 G.