All-optical pump-and-probe detection of dynamical correlations in a two-dimensional Fermi gas

Details All-optical pump-and-probe detection of dynamical correlations in a two-dimensional Fermi gas All-optical pump-and-probe detection of dynamical correlations in a two-dimensional Fermi gas

2009-05-18

arxiv.org/abs/0905.2826v2

Phys. Rev. A 81, 043626 (2010)

Physics

Condensed Matter

Quantum Gases

4 pages, 4 figures. To be published in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.81.043626

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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