A fast impurity solver based on equations of motion and decoupling
Strongly Correlated Electrons
2009-06-10 v2
Abstract
In this paper a fast impurity solver is proposed for dynamical mean field theory (DMFT) based on a decoupling of the equations of motion for the impurity Greens function. The resulting integral equations are solved efficiently with a method based on genetic algorithms. The Hubbard and periodic Anderson models are studied with this impurity solver. The method describes the Mott metal insulator transition and works for a large range of parameters at finite temperature on the real frequency axis. This makes it useful for the exploration of real materials in the framework of LDA+DMFT.
Cite
@article{arxiv.0903.4838,
title = {A fast impurity solver based on equations of motion and decoupling},
author = {Qingguo Feng and Yuzhong Zhang and Harald O. Jeschke},
journal= {arXiv preprint arXiv:0903.4838},
year = {2009}
}