Breakdown of the Mott insulator: Exact solution of an asymmetric Hubbard model
Statistical Mechanics
2009-10-31 v1
Abstract
The breakdown of the Mott insulator is studied when the dissipative tunneling into the environment is introduced to the system. By exactly solving the one-dimensional asymmetric Hubbard model, we show how such a breakdown of the Mott insulator occurs. As the effect of the tunneling is increased, the Hubbard gap is monotonically decreased and finally disappears, resulting in the insulator-metal transition. We discuss the origin of this quantum phase transition in comparison with other non-Hermitian systems recently studied.
Keywords
Cite
@article{arxiv.cond-mat/9806023,
title = {Breakdown of the Mott insulator: Exact solution of an asymmetric Hubbard model},
author = {T. Fukui and N. Kawakami},
journal= {arXiv preprint arXiv:cond-mat/9806023},
year = {2009}
}
Comments
7 pages, revtex