Stochastic series expansion method with operator-loop update

Preprint

16 February 1999

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9902226

Abstract

A cluster update (the ``operator-loop'') is developed within the framework of a numerically exact quantum Monte Carlo method based on the power series expansion of exp(-BH) (stochastic series expansion). The method is generally applicable to a wide class of lattice Hamiltonians for which the expansion is positive definite. For some important models the operator-loop algorithm is more efficient than loop updates previously developed for ``worldline'' simulations. The method is here tested on a two-dimensional anisotropic Heisenberg antiferromagnet in a magnetic field.

Keywords

STOCHASTIC SERIES EXPANSION
MONTE CARLO METHOD
ANTIFERROMAGNET
CLUSTER UPDATE
OPERATOR LOOP
LOOP UPDATES

All Related Versions

Version 1, 1999-02-16, ArXiv
Published version: Physical Review B, 59 (22), R14157.

This publication has 0 references indexed in Scilit: