All-optical pump-and-probe detection of dynamical correlations in a two-dimensional Fermi gas
arXiv:0905.2826 · doi:10.1103/PhysRevA.81.043626
Abstract
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.
4 pages, 4 figures. To be published in Phys. Rev. A
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