Exact Drude weight for the one-dimensional Hubbard model at finite temperatures
Strongly Correlated Electrons
2009-10-30 v1
Abstract
The Drude weight for the one-dimensional Hubbard model is investigated at finite temperatures by using the Bethe ansatz solution. Evaluating finite-size corrections to the thermodynamic Bethe ansatz equations, we obtain the formula for the Drude weight as the response of the system to an external gauge potential. We perform low-temperature expansions of the Drude weight in the case of half-filling as well as away from half-filling, which clearly distinguish the Mott-insulating state from the metallic state.
Keywords
Cite
@article{arxiv.cond-mat/9710313,
title = {Exact Drude weight for the one-dimensional Hubbard model at finite temperatures},
author = {Satoshi Fujimoto and Norio Kawakami},
journal= {arXiv preprint arXiv:cond-mat/9710313},
year = {2009}
}
Comments
9 pages, RevTex, To appear in J. Phys. A