Dresden 2006 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 25: Correlated Electrons - Poster Session

TT 25.66: Poster

Mittwoch, 29. März 2006, 14:30–18:30, P1

Equilibrium dynamics of the Anderson Impurity Model from functional RG methods — •Ralf Hedden, Volker Meden, Thomas Pruschke, and Kurt Schönhammer — Institut für theoretische Physik, Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen

We calculate the single-particle Greens-function of quantum multi impurity systems with local correlations modelled by the Anderson Impurity Model using a functional renormalization group scheme. Systems of one, two and three impurities coupled by hopping matrix elements are studied. The influence of an Ising-like Hund’s-coupling is investigated. For special parameter sets we can even treat systems with an arbitrary number of impurities. We investigate how the different parameters effect the behaviour of the local spectral function.