Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie
Q 57.30: Poster
Donnerstag, 17. März 2011, 16:30–19:30, P1
Non-equilibrium dynamics in a Kondo lattice of ultracold fermionic alkaline-earth-metal atoms — •Sebastian Bock1,2, Matthias Kronenwett1,2, Michael Foss-Feig3, Ana Maria Rey3, and Thomas Gasenzer1,2 — 1Institut für theoretische Physik, Philosophenweg 16, 69120 Heidelberg — 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, 64291 Darmstadt — 3JILA, University of Colorado, Boulder CO-80309, USA
We study the dynamics of ultracold Fermi gases far from thermal equilibrium. We employ a functional-integral approach based on the Schwinger-Keldysh closed time path integral to derive the two-particle irreducible (2PI) effective action. From this, the two-point correlation functions are determined self-consistently. The action is expanded in inverse powers of N, where N is the number of atomic hyperfine states. The dynamic equations are derived in next-to-leading order of this expansion. This approach reaches far beyond mean-field theory and includes quantum statistical aspects of equilibration dynamics. This formalism is especially suited to describe far-from-equilibrium dynamics in a Kondo lattice of ultracold fermionic alkaline-earth-metal atoms where N can be as large as 10.