Performance analysis of continuous-time solvers for quantum impurity models
强关联电子
2011-11-09 v2
摘要
Impurity solvers play an essential role in the numerical investigation of strongly correlated electrons systems within the "dynamical mean field" approximation. Recently, a new class of continuous-time solvers has been developed, based on a diagrammatic expansion of the partition function in either the interactions or the impurity-bath hybridization. We investigate the performance of these two complementary approaches and compare them to the well-established Hirsch-Fye method. The results show that the continuous-time methods, and in particular the version which expands in the hybridization, provide substantial gains in computational efficiency.
引用
@article{arxiv.cond-mat/0609438,
title = {Performance analysis of continuous-time solvers for quantum impurity models},
author = {Emanuel Gull and Philipp Werner and Andrew J. Millis and Matthias Troyer},
journal= {arXiv preprint arXiv:cond-mat/0609438},
year = {2011}
}