Berlin 2012 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 45: Correlated Electrons: Poster Session
TT 45.21: Poster
Donnerstag, 29. März 2012, 15:00–19:00, Poster B
Kondo regime of the non-equilibrium time evolution of an Anderson quantum dot — •Sebastian Bock1,2, Denes Sexty1,2, and Thomas Gasenzer1,2 — 1Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany — 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
We study the Kondo regime of the non-equilibrium time evolution of an Anderson quantum dot. The quantum dot is coupled between two leads forming a chemical-potential gradient and the tunneling to the leads is taken into account exactly. We apply the functional-integral approach based on the Schwinger-Keldysh closed time path integral to derive the Kadanoff-Baym dynamic equations from the two-particle-irreducible (2PI) effective action. The dynamic equations are derived in non-perturbative approximation of the resummation of the bubble chains to all orders. We analyse the dynamical evolution of the two-point correlation function with respect to the Kondo resonance.