Two Theorems on Pseudo-spin in the Hubbard Model
Strongly Correlated Electrons
2009-10-31 v1
Abstract
An inequality of the eigenvalues of the reduced density matrix at finite temperature in the Hubbard model is obtained by means of the Bogolyubov inequality. The quasi-average of in a simple symmetry-breaking perturbation of the Hamiltonian for a bipartite lattice is shown to be zero.
Cite
@article{arxiv.cond-mat/9911163,
title = {Two Theorems on Pseudo-spin in the Hubbard Model},
author = {Sze-Shiang Feng},
journal= {arXiv preprint arXiv:cond-mat/9911163},
year = {2009}
}
Comments
8 pages, LATEX, no figures