Dresden 2009 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 6: Postersession Correlated Electrons: (General) Theory, Low-Dimensional Systems, Kondo Physics, Heavy Fermions, Quantum-Critical Phenomena

TT 6.45: Poster

Montag, 23. März 2009, 13:00–16:45, P1A

Periodic time dependent Kondo model — Markus Heyl and •Stefan Kehrein — Arnold-Sommerfeld-Center for Theoretical Physics, Ludwigs-Maximilians-Universität München

In this work we study a nonequilibrium steady state in the Kondo model generated by periodic switching of the interaction. As has been shown in Ref. [1], at the Toulouse point the Kondo model can be mapped onto a noninteracting resonant level model even for nonequilibrium interaction quenches. Since the resonant level model is exactly solvable, we are therefore able to investigate the real-time dynamics on all time scales, especially the buildup of the steady state. We characterize this steady state by calculating the spin-spin correlation function.

[1] D. Lobaskin and S. Kehrein, J. Stat. Phys. 123, 301-313 (2006).