Berlin 2012 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 45: Correlated Electrons: Poster Session

TT 45.56: Poster

Donnerstag, 29. März 2012, 15:00–19:00, Poster B

cRPA study of a three band one-dimensional Hubbard model — •Michael Seißinger and Fakher F. Assaad — Institut für Theoretische Physik und Astrophysik, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany

Starting from a three band one-dimensional model, we derive an effective one band low energy model using a functional integral formulation of the cRPA approach. The effective model with retarded interactions can be simulated with continuous time weak coupling QMC methods. Our aim is to monitor the variation of the Luttinger liquid exponent as function of the energy scale of the high energy bands which are integrated out in the cRPA approach.