On the ground state and excitations of a four-component fermion model
Strongly Correlated Electrons
2009-11-10 v1
Abstract
The properties of the ground state and excitations of a four-component Hubbard-like model are studied by the Lieb-Schultz-Mattis approach. It is proven rigorously that the ground state of the model is nondegenerate and excitations are gapless at all band fillings.
Keywords
Cite
@article{arxiv.cond-mat/0407601,
title = {On the ground state and excitations of a four-component fermion model},
author = {You-Quan Li and Guan-Shan Tian and Michael Ma and Hai-Qing Lin},
journal= {arXiv preprint arXiv:cond-mat/0407601},
year = {2009}
}
Comments
Revtex, 4 pages, no figure