Improved Green's function measurement for hybridization expansion quantum Monte Carlo

被引：8
|
作者：
Augustinsky, Pavel [1 ,2 ]
Kunes, Jan [2 ]
机构：
[1] Univ Augsburg, Inst Phys, Ctr Elect Correlat & Magnetism, D-86135 Augsburg, Germany
[2] Acad Sci Czech Republic, Inst Phys, Prague 16200, Czech Republic
来源：
COMPUTER PHYSICS COMMUNICATIONS | 2013年 / 184卷 / 09期
关键词：
CT-HYB; Measurement; MEAN-FIELD THEORY; IMPURITY MODELS; SYSTEMS;
D O I：
10.1016/j.cpc.2013.04.005
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
We present an algorithm for measurement of the Green's function in the hybridization expansion continuous-time quantum Monte-Carlo method based on continuous estimators. Compared to the standard method, the present algorithm has a similar or better accuracy with an improvement notable especially at low perturbation orders and high frequencies. The resulting statistical noise is weakly correlated so high-accuracy data for the numerical analytical continuation can be produced. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：2119 / 2126
页数：8
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