Radio-frequency spectroscopy and the pairing gap in trapped Fermi gases
Radio-frequency spectroscopy and the pairing gap in trapped Fermi gases
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DOI：
10.1103/physreva.72.011602
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发表时间：
2005-04
影响因子：
2.9
通讯作者：
Yan He;Qijin Chen;K. Levin
中科院分区：
文献类型：
--
作者：
Yan He;Qijin Chen;K. Levin
我们提出了一个理论解释的射频（RF）配对间隙实验中被困原子费米气体，在整个范围内的BCS玻色爱因斯坦凝聚（BEC）交叉，温度高于和低于T{sub c}。我们计算的RF激发光谱，以及它们所基于的密度分布，是半定量的协议与实验。我们提供了一个详细的分析RF光谱中看到的两个不同的峰值特征的物理起源，一个与几乎自由的原子在陷阱的边缘，和其他（准）绑定费米子对。
We present a theoretical interpretation of radio frequency (RF) pairing gap experiments in trapped atomic Fermi gases, over the entire range of the BCS-Bose-Einstein condensation (BEC) crossover, for temperatures above and below T{sub c}. Our calculated RF excitation spectra, as well as the density profiles on which they are based, are in semiquantitative agreement with experiment. We provide a detailed analysis of the physical origin of the two different peak features seen in RF spectra, one associated with nearly free atoms at the edge of the trap, and the other with (quasi-)bound fermion pairs.