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TT: Fachverband Tiefe Temperaturen

TT 27: CE: Poster Session

TT 27.54: Poster

Mittwoch, 24. März 2010, 14:00–18:00, Poster D1

spatiotemporal formation of the Kondo screening cloud — •Alexander Hoffmann and Stefan Kehrein — Physics Department, ASC, and CeNS, Ludwig-Maximilians-Universität, Theresienstrasse 37, 80333 Munich, Germany

The Kondo model is the paradigm for describing correlated quantum impuritites. Its equilibrium properties are well known, but its non-equilibrium behavior has recently attracted a lot of attention. We calculate the time dependent spin-spin correlation function between the impurity spin and the conduction band spin after a sudden switching on of the interaction. This amounts to studying the spatiotemporal formation of the Kondo screening cloud. To this end we bosonize the Kondo model and then refemionize it at the Toulouse point.