Pseudogaps: introducing the length scale into dynamical mean-field theory

Pseudogaps in the t-J model: An extended dynamical mean-field theory study

K. Haule, A. Rosch, J. Kroha, and P. Wölfle Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Road, Piscataway, New Jersey 08854-8019, USA Institut für Theorie der Kondensierten Materie, Universität Karlsruhe, D-76128 Karlsruhe, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, 53115 Bonn, Germany J. Stefan Institute, 1000 Ljubljana, Slovenia ~Received 4 ...

Dynamical mean-field theory

Nonequilibrium dynamical mean-field theory.

The many-body formalism for dynamical mean-field theory is extended to treat nonequilibrium problems. We illustrate how the formalism works by examining the transient decay of the oscillating current that is driven by a large electric field turned on at time t=0. We show how the Bloch oscillations are quenched by the electron-electron interactions, and how their character changes dramatically f...

Nonequilibrium dynamical mean-field theory

Dynamical mean-field theory for quantum chemistry.

The dynamical mean-field concept of approximating an unsolvable many-body problem in terms of the solution of an auxiliary quantum impurity problem, introduced to study bulk materials with a continuous energy spectrum, is here extended to molecules, i.e., finite systems with a discrete energy spectrum. The application to small clusters of hydrogen atoms yields ground state energies which are co...