Dresden 2014 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 79: Correlated Electrons - Poster Session

TT 79.63: Poster

Mittwoch, 2. April 2014, 15:00–19:00, P2

Self-energy and analytic continuation for multi-orbital quantum impurity models — •Andreas Hausoel, Nicolaus Parragh, and Giorgio Sangiovanni — University of Würzburg, Germany

Continuous-time quantum Monte Carlo (CTQMC) allows us to treat quantum-impurity problems with several orbitals and general interactions. We present strategies to reduce the computational effort exploiting conserved quantities of the local Hamiltonian. In order to perform the analytic continuation of the self-energy from the Matsubara to the real axis the high frequency behavior is needed. We discuss how the necessary measurements can be implemented in hybridization-expansion CTQMC for multi-orbital problems and show first applications.