FIXED-NODE QUANTUM MONTE-CARLO METHOD FOR LATTICE FERMIONS

被引：73
|
作者：
VANBEMMEL, HJM
TENHAAF, DFB
VANSAARLOOS, W
VANLEEUWEN, JMJ
AN, G
机构：
[1] Institute Lorentz, Leiden University, 2300 RA Leiden
[2] Shell Research, 2280 AB, Rijswijk
来源：
PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 15期
关键词：
D O I：
10.1103/PhysRevLett.72.2442
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We give a new prescription for performing random walks in configuration space for lattice fermion problems. Imposing a suitable condition for the wave function on nodal boundaries in configuration space enables us to devise a generalization of the fixed-node quantum Monte Carlo method, as it has been developed for continuum problems. It does not suffer from the sign problem and provides upper bounds for the energy of different candidates for the ground state. We present new results for the Hubbard model off half filling as a demonstration of the method.
引用
收藏
页码：2442 / 2445
页数：4
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