Gaussian quantum Monte Carlo methods for fermions and bosons

被引：90

作者：

Corney, JF ^{[1
]}

Drummond, PD ^{[1
]}

机构：

[1] Univ Queensland, ARC Ctr Excellence Quantum Atom Opt, Brisbane, Qld 4072, Australia

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 26期

基金：

澳大利亚研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.93.260401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We introduce a new class of quantum Monte Carlo methods, based on a Gaussian quantum operator representation of fermionic states. The methods enable first-principles dynamical or equilibrium calculations in many-body Fermi systems, and, combined with the existing Gaussian representation for bosons, provide a unified method of simulating Bose-Fermi systems. As an application relevant to the Fermi sign problem, we calculate finite-temperature properties of the two dimensional Hubbard model and the dynamics in a simple model of coherent molecular dissociation.

引用

页数：4

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