IMPROVED TROTTER-LIKE FORMULA

被引：46

作者：

SUZUKI, M

机构：

[1] Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo, 113

来源：

PHYSICS LETTERS A | 1993年 / 180卷 / 03期

关键词：

D O I：

10.1016/0375-9601(93)90701-Z

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A new higher-order approximant of the trace of exponential operators is proposed, namely Tr exp[x(A+B)]=Tr{(e(xA/2n)e(xB/n)e(xA/2n))n exp[(x3/8n2)S3]} + O(1/n4), where S3=1/6[2A+B, [B, A]]. This can be applied to quantum Monte Carlo simulations. This new formula has the great merit that the decomposition parameters of higher order are all positive except the term S3.

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页码：232 / 234

页数：3

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