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TT: Fachverband Tiefe Temperaturen

TT 18: Correlated Electrons: Quantum Impurities, Kondo Physics 2

TT 18.3: Talk

Tuesday, March 27, 2012, 10:00–10:15, H 3005

Distributional exact diagonalization formalism for quantum impurity models — •Mats Granath and Hugo Strand — Department of Physics, University of Gothenburg, Gothenburg, Sweden

We develop a method for calculating the self energy of a general quantum impurity problem using a distribution of finite size Anderson models. When used in the context of dynamical mean field theory it provides an extension of the exact diagonalization formalism which gives a continuous real frequency self energy without the need for analytic continuation from imaginary frequencies.