Quantum Monte Carlo simulation in the canonical ensemble at finite temperature
Statistical Mechanics
2009-11-11 v2 Nuclear Theory
Abstract
A quantum Monte Carlo method with non-local update scheme is presented. The method is based on a path-integral decomposition and a worm operator which is local in imaginary time. It generates states with a fixed number of particles and respects other exact symmetries. Observables like the equal-time Green's function can be evaluated in an efficient way. To demonstrate the versatility of the method, results for the one-dimensional Bose-Hubbard model and a nuclear pairing model are presented. Within the context of the Bose-Hubbard model the efficiency of the algorithm is discussed.
Cite
@article{arxiv.cond-mat/0508431,
title = {Quantum Monte Carlo simulation in the canonical ensemble at finite temperature},
author = {Kris Van Houcke and Stefan Rombouts and Lode Pollet},
journal= {arXiv preprint arXiv:cond-mat/0508431},
year = {2009}
}
Comments
11 pages, 8 figures