二维费米气体动力学关联的全光泵浦探测
All-optical pump-and-probe detection of dynamical correlations in a two-dimensional Fermi gas
摘要：
提出了一个全光学方案来研究强相互作用超冷原子气体的动力学关联。所提出的技术是基于泵浦和探测方案：相干光脉冲最初被转换成原子的相干性，并在可变的存储时间后检索。通过对正常费米气体和BCS超流态两种情况下的预期信号的数值计算和解析计算，验证了该方法测量气体单粒子格林函数的有效性.协议提取超流间隙和充分准粒子分散体进行了讨论。
英文摘要：
We propose an all-optical scheme to probe the dynamical correlations of a strongly-interacting gas of ultracold atoms. The proposed technique is based on a pump-and-probe scheme: a coherent light pulse is initially converted into an atomic coherence and later retrieved after a variable storage time. The efficiency of the proposed method to measure the one-particle Green function of the gas is validated by numerical and analytical calculations of the expected signal for the two cases of a normal Fermi gas and a BCS superfluid state. Protocols to extract the superfluid gap and the full quasi-particle dispersions are discussed.
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