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TT: Fachverband Tiefe Temperaturen

TT 37: Correlated Electrons: Quantum Impurities, Kondo Physics

TT 37.6: Vortrag

Freitag, 29. Februar 2008, 11:45–12:00, H 2053

Quantum systems coupled to baths: A novel Chebyshev space description — •Andreas Alvermann and Holger Fehske — Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, Felix-Hausdorff-Str. 6, 17489 Greifswald, Germany

We propose a new concept for the dynamics of a quantum bath, the Chebyshev space method. Relying on Chebyshev expansions the Chebyshev space representation of the bath degrees of freedom has very favorable properties with respect to extremely precise and efficient numerical calculations of groundstate properties, static and dynamical correlations, and time-evolution for a great variety of quantum systems. In particular we can address important topics like transport through quantum systems coupled to fermionic baths, the solution of quantum impurity models, or the non-equilibrium dynamics of mesoscopic devices coupled to leads.