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Helium3 Kalkulator

German version

Forschergruppe 1346
Transregio 80
Sonderforschungsbereich 484 (2000-2009)
Center for Electronic Correlations and Magnetism (EKM)
Department of Physics
Augsburg University


Prof. Dr. Dieter Vollhardt

Chair in Theoretical Physics
Center for Electronic Correlations and Magnetism
Theoretical Physics III
Institute of Physics
University of Augsburg
D-86135 Augsburg

Office Office: 4A 408, EKM-Building

Phone Phone: +49 - 821 - 598 - 3700

Mailbox Email: Dieter.Vollhardt@Physik.Uni-Augsburg.DE

Curriculum Vitae

During 1971-1976 Dieter Vollhardt studied physics at the University of Hamburg. From 1976 to 1979 he worked with Professor Kazumi Maki at the University of Southern California in Los Angeles on the theory of critical currents in superfluid Helium 3. This was also the topic of his Diploma Thesis (1977) and his Doctoral Thesis (1979) at the University of Hamburg. From 1979 to 1984 Dieter Vollhardt was Research Associate of Professor Peter Wölfle, and from 1984 to 1987 a Heisenberg-Fellow of the Deutsche Forschungsgemeinschaft, at the Max-Planck-Institute for Physics and Astrophysics (Heisenberg-Institute) in Munich. During this time he also stayed at various research institutions in the U.S., among them, in 1983, the Institute for Theoretical Physics, Santa Barbara, and Bell Laboratories, Murray Hill. In 1984 he completed his Habilitation at the Technical University of Munich. In 1987 Dieter Vollhardt was appointed to the Chair in Theoretical Physics C, and became Director at the Institute of Theoretical Physics, at the RWTH Aachen University. Since 1996 he holds the Chair in Theoretical Physics on Electronic Correlations and Magnetism at the Institute of Physics of the University of Augsburg.

Dieter Vollhardt's main areas of research are the theory of electronic correlations and magnetism, e.g., the realistic modelling of strongly correlated materials (see Physics Today, March 2004, and Einstein Lecture, 2012), disordered electronic systems, and normal and superfluid Helium 3. He is author (together with P. Wölfle, Karlsruhe) of the book The Superfluid Phases of Helium 3 (Dover Publications, 2013: Corrected, unabridged republication of the edition originally published by Taylor & Francis, 1990; with a new preface, 656 pages; Chapter 1 (Introduction)). As the German representative in Commission C5 (Low Temperatures) of the International Union of Pure and Applied Physics (IUPAP) during 1999 - 2005 he contributed to the book "Physics Now" of the IUPAP published in 2004 which contains reviews of the state of the art in physics. He is currently the spokesman of the DFG Research Unit FOR1346 Dynamical Mean-Field Approach with Predictive Power for Strongly Correlated Materials.

On the occasion of his 60th birthday the International Workshop on Electronic Correlations in Models and Materials took place in Augsburg in September 2011.

Areas of Current Research

Realistic modelling of strongly correlated electronic systems

We develop and apply the novel computational scheme LDA+DMFT to explore the properties of electronically correlated materials from first principles. LDA+DMFT is based on a combination of conventional methods for computing electronic band structures, e.g., the local density approximation (LDA), with the dynamical mean-field theory (DMFT) for correlated electron systems.

Metal-insulator transitions in electronic systems

Phase transitions between metallic, non-metallic, magnetically ordered and non-ordered states in correlated and/or disordered electronic systems are investigated within dynamical mean-field theory (DMFT) together with finite temperature quantum Monte-Carlo techniques, the numerical renormalization group, and other techniques. Thereby the influence of disorder, frustration and doping on the transitions is studied.

Microscopic theory of magnetism

We investigate the microscopic conditions for the stability of long-range ordered magnetic states in strongly correlated insulators and metals. A broad range of theoretical tools (exact analytic methods, perturbation theory at weak and strong coupling, low and high dimensions, variational procedures, quantum Monte-Carlo calculations, numerical renormalization group, etc.) is employed for this purpose.

Correlated electrons in nonequilibrium

The real-time dynamics of correlated electrons are studied using dynamical mean-field-theory for nonequilibrium. This approach can be used in particular to describe pump-probe experiments, in which the sample is excited by a first laser pulse and analyzed with a second laser pulse after a controlled time delay.

Correlated bosonic systems

The properties of correlated lattice bosons are investigated by means of the newly developed bosonic dynamical mean-field theory (B-DMFT). In this approach the dynamic coupling between normal and condensed bosons is explicitly included.

Development of new theoretical methods

We develop analytical and numerical approaches for the non-perturbative investigation of electronic correlation phenomena in quantum mechanical lattice models.

Introductory literature

Elektronische Korrelationen und Magnetismus: Eine Einführung (in German) (pdf)
Strongly Correlated Materials: Insights from Dynamical Mean-Field Theory, G. Kotliar and D. Vollhardt, Physics Today (March 2004)
Elektronische Korrelationen im Festkörper (in German), Physik Journal (August/September 2010) (pdf)
Dynamical mean-field theory for correlated electrons, Annalen der Physik (Januar 2012) (pdf)

Lecture Notes:
Investigations of correlated electron systems using the limit of high dimensions (1993)
Strong-coupling approaches to correlated fermions (1994)
Dynamical mean-field theory of electronic correlations in models and materials (2010)
From Gutzwiller Wave Functions to Dynamical Mean-Field Theory (2014)

see also:
Research topics / Selected publications
Publication list (PDF)

URL: http://www.physik.uni-augsburg.de/theo3/index.vollha.en.shtml