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A two-channel model with Hubbard-Stratonovich field is used to study a spin-balanced Fermi gas at finite temperature in the normal and superfluid phase. A Dyson-Schwinger approach is used to compute full Green's functions iteratively. Using a spectral representation, the Matsubara sums are computed and analytically continued to real frequencies. In this way, the full spectral functions are calculated directly. Finally, these results are used to study real-time and transport properties of ultracold atomic gases.

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Eugen Dizer, Universität Heidelberg
Seminar Room 0.02, ETP
Contact: Sebastian Diehl