Low-temperature density matrix renormalization group using regulated polynomial expansion
Strongly Correlated Electrons
2009-03-09 v2
Abstract
We propose a density matrix renormalization group (DMRG) technique at finite temperatures. As is the case of the ground state DMRG, we use a single-target state that is calculated by making use of a regulated polynomial expansion. Both static and dynamical quantities are obtained after a random-sampling and averaging procedure. We apply this technique to the one-dimensional Hubbard model at half filling and find that this gives excellent results at low temperatures.
Cite
@article{arxiv.0806.3352,
title = {Low-temperature density matrix renormalization group using regulated polynomial expansion},
author = {Shigetoshi Sota and Takami Tohyama},
journal= {arXiv preprint arXiv:0806.3352},
year = {2009}
}
Comments
5 pages, 3 figures. Accepted for publication in Phys. Rev. B