Berlin 2012 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 45: Correlated Electrons: Poster Session
TT 45.102: Poster
Donnerstag, 29. März 2012, 15:00–19:00, Poster B
Viscosity of a two dimensional Fermi gas at strong coupling — •Carolin Küppersbusch1, Lars Fritz1, and Tilman Enss2 — 1Universität zu Köln, Institut für theoretische Physik, Zülpicher Strasse 77, 50937 Köln — 2Physik Department, Technische Universität München, 85747 Garching, Germany
We consider a two dimensional Fermi gas which is experimentally realized in balanced and imbalanced fermionic ultra cold atom systems. An experimentally accessible quantity that has received a lot of interest recently as a measure of the interaction strength is the shear viscosity. This quantity describes the resistance of the system towards establishing a flow gradient. Using a Boltzmann equation we calculate the viscosity in all temperature and interaction ranges from a full numerical solution. In the high temperature limit we compare our results with the analytic solution of the non-degenerate Fermi gas.