Regensburg 2007 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 20: Correlated Electrons - Poster Session

TT 20.20: Poster

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

Coupled-Cluster Method for the Anderson Impurity Model — •Jin-Jun Liang, Clive Emary, and Tobias Brandes — Sekr. PN 7-1, Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, D-10623 BERLIN-Charlottenburg

The coupled-cluster method (CCM) is one of the most powerful and numerically accurate approximation method for describing many-body systems. It is popular in nuclear physics, quantum chemistry and quantum magnetism. However, the method has been rarely applied to the Anderson impurity model. Here with CCM, we calculate the model’s energies and wave-functions for the ground state as well as some excited states. Results are compared with those from other methods, including self-consistent perturbation and variational methods.