Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

TT: Fachverband Tiefe Temperaturen

TT 19: Correlated Electrons: (General) Theory 2

TT 19.2: Vortrag

Dienstag, 27. März 2012, 09:45–10:00, H 3010

Quantification of correlations in quantum many-particle systems — •Krzysztof Byczuk¹, Jan Kunes², Walter Hofstetter³, and Dieter Vollhardt⁴ — ¹Physics Faculty, Institute of Theoretical Physics, University of Warsaw, ul. Hoza 69, 00-681 Warszawa, Poland — ²Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnicka 10, 162 53 Praha 6, Czech Republic — ³Institut for Theoretische Physics, Goethe-Universitat, 60438 Frankfurt/Main, Germany — ⁴Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany

We introduce a well-defined and unbiased measure of the strength of correlations in quantum many-particle systems which is based on the relative von Neumann entropy computed from the density operator of correlated and uncorrelated states [1]. The usefulness of this general concept is demonstrated by quantifying correlations of interacting electrons in the Hubbard model and in a series of transition metal oxides using dynamical mean-field theory.
K. Byczuk, J. Kunes, W. Hofstetter, and D. Vollhardt; arXiv:1110.3214