PROOF FOR AN UPPER BOUND IN FIXED-NODE MONTE-CARLO FOR LATTICE FERMIONS

被引：126

作者：

TENHAAF, DFB ^{[1
]}

VANBEMMEL, HJM ^{[1
]}

VANLEEUWEN, JMJ ^{[1
]}

VANSAARLOOS, W ^{[1
]}

CEPERLEY, DM ^{[1
]}

机构：

[1] UNIV ILLINOIS,NATL CTR SUPERCOMP APPLICAT,URBANA,IL 61801

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.51.13039

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We justify a recently proposed prescription for performing Green function Monte Carlo calculations on systems of lattice fermions, by which one is able to avoid the sign problem. We generalize the prescription such that it can also be used for problems with hopping terms of different signs. We prove that the effective Hamiltonian, used in this method, leads to an upper bound for the ground-state energy of the real Hamiltonian, and we illustrate the effectiveness of the method on small systems. © 1995 The American Physical Society.

引用

页码：13039 / 13045

页数：7

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