强相互作用费米子的射频谱理论
Theory of RF-spectroscopy of strongly interacting Fermions
摘要：
我们表明，费米气体中的强配对相关导致出现的间隙状结构的RF-频谱，无论是在平衡的超流和正常阶段以上的Clogston-Ehrasekhar限制。幺正气体的平均射频位移正比于费米速度和散射长度与终态的比值。在强不平衡的情况下，RF谱测量少数原子与多数原子的费米海的结合能。我们的研究结果提供了一个定性的理解Schunck等人最近的实验。
英文摘要：
We show that strong pairing correlations in Fermi gases lead to the appearance of a gap-like structure in the RF-spectrum, both in the balanced superfluid and in the normal phase above the Clogston-Chandrasekhar limit. The average RF-shift of a unitary gas is proportional to the ratio of the Fermi velocity and the scattering length with the final state. In the strongly imbalanced case, the RF-spectrum measures the binding energy of a minority atom to the Fermi sea of majority atoms. Our results provide a qualitative understanding of recent experiments by Schunck et.al.
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