1.
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics
; 61(4 Pt B): 4566-75, 2000 Apr.
Article
in English
| MEDLINE
| ID: mdl-11088257
ABSTRACT
In this paper we discuss various aspects of diffusion Monte Carlo methods using a fixed number of walkers. First, a rigorous proof of the divergence of pure diffusion Monte Carlo (PDMC) methods (DMC without branching in which the weights are carried along trajectories) is given. Second, a bias-free Monte Carlo method combining DMC and PDMC approaches, and based on a minimal stochastic reconfiguration of the population, is discussed. Finally, some illustrative calculations for a system of coupled quantum rotators are presented.