A slave-boson mean-field theory for general multi-band Hubbard models
Strongly Correlated Electrons
2015-05-18 v2
Abstract
We introduce a new slave-boson mean-field theory which allows the investigation of general multi-band Hubbard models. Unlike earlier attempts of such a generalisation, in our approach the quantum-mechanical problem is exactly reformulated in an extended Hilbert space of Fermions and Bosons before a mean-field approximation is applied. Systems with superconducting order parameters are naturally included in our formalism. Our ground-state energy functional agrees with the corresponding quantity derived within the Gutzwiller theory.
Keywords
Cite
@article{arxiv.1002.3228,
title = {A slave-boson mean-field theory for general multi-band Hubbard models},
author = {J. Bünemann},
journal= {arXiv preprint arXiv:1002.3228},
year = {2015}
}
Comments
8 pages, accepted for publication in Phys. Status Solidi B