Comment on "Cluster methods for strongly correlated electron systems"

被引：18

作者：

Aryanpour, K ^{[1
]}

Maier, TA

Jarrell, M

机构：

[1] Univ Cincinnati, Cincinnati, OH 45221 USA

[2] Univ Calif Davis, Davis, CA 95616 USA

[3] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.71.037101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We comment on the article by Biroli and Kotliar [Phys. Rev. B 65, 155112 (2002)] in which they make a comparison between two cluster techniques, the cellular dynamical mean field theory (CDMFT) and the dynamical cluster approximation (DCA). Based upon an incorrect implementation of the DCA technique in their work, they conclude that the CDMFT is a faster converging technique than the DCA. We present the correct DCA prescription for the particular model Hamiltonian studied in their article and conclude that the DCA, once implemented correctly, is a faster converging technique for the quantities averaged over the cluster.

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