The time-dependent Gutzwiller theory for multi-band Hubbard models

Details The time-dependent Gutzwiller theory for multi-band Hubbard models The time-dependent Gutzwiller theory for multi-band Hubbard models

2011-07-08

arxiv.org/abs/1107.1631v2

New J. Phys. 13 (2011) 113031

Physics

Condensed Matter

Strongly Correlated Electrons

42 pages, 4 figures

Scientific paper

10.1088/1367-2630/13/11/113031

We formulate a multi-band generalisation of the time-dependent Gutzwiller theory. This approach allows for the calculation of general two-particle response functions, which are crucial for an understanding of various experiments in solid-state physics. As a first application, we study the momentum- and frequency-resolved magnetic susceptibility in a two-band Hubbard model. Like in the underlying ground-state approaches we find significant differences between the results of our method and those from a time-dependent Hartree-Fock approximation.

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