Regensburg 2007 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

TT: Fachverband Tiefe Temperaturen

TT 20: Correlated Electrons - Poster Session

TT 20.22: Poster

Mittwoch, 28. März 2007, 14:00–17:45, Poster A

Correlation Functions in the Non-Equilibrium Anisotropic Kondo Model — •Peter Fritsch and Stefan Kehrein — Physics Department, ASC, and CeNS, Ludwig-Maximilians-Universität, Theresienstrasse 37, 80333 Munich, Germany

In this work we investigate the spin-spin correlation function in the Anisotropic Kondo Model using the method of infinitesimal unitary transformations (flow equations) [1]. We derive a perturbative scaling picture of the model which allows us to study the long-time evolution of observables. Within this framework we are able to study the effect of both equilibrium and non-equilibrium (dc voltage bias) decoherence on the physical properties of this model.

Future plans include the investigation of the Kondo Model in a magnetic field. This work is a generalization of the previous flow equation analysis of the non-equilibrium Kondo Model [2] for systems without SU(2)-symmetry.

[1] S. Kehrein, The Flow Equation Approach to Many-Particle Systems, Springer Tracts in Modern Physics 217

[2] S. Kehrein, Phys. Rev. Lett. 95, 056602 (2005)