A Quantum Monte Carlo method at fixed energy

被引：2

作者：

Farhi, Edward ^{[1
]}

Goldstone, Jeffrey ^{[1
]}

Gosset, David ^{[1
]}

Meyer, Harvey B. ^{[1
,2
]}

机构：

[1] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA

[2] CERN, Dept Phys, CH-1211 Geneva 23, Switzerland

来源：

COMPUTER PHYSICS COMMUNICATIONS | 2011年 / 182卷 / 08期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

Quantum Monte Carlo; Quantum spin systems; MODEL;

D O I：

10.1016/j.cpc.2011.04.021

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

In this paper we explore ways to study the zero temperature limit of quantum statistical mechanics using Quantum Monte Carlo simulations. We develop a Quantum Monte Carlo method in which one fixes the ground state energy as a parameter. The Hamiltonians we consider are of the form H = H-0 + lambda V with ground state energy E. For fixed H-0 and V. one can view E as a function of lambda whereas we view lambda as a function of E. We fix E and define a path integral Quantum Monte Carlo method in which a path makes no reference to the times (discrete or continuous) at which transitions occur between states. For fixed E we can determine lambda(E) and other ground state properties of H. (C) 2011 Elsevier BM. All rights reserved.

引用

页码：1663 / 1673

页数：11

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