V. G. Rousseau, D. Galanakis
The Stochastic Green Function (SGF) algorithm is able to simulate any Hamiltonian that does not suffer from the so-called "sign problem". We propose a new global space-time update scheme for the SGF algorithm which greatly reduces auto-correlation times relative to previous updating schemes. Using as a concrete example the Bose-Hubbard model and the complex Hamiltonian with six-site ring-exchange interactions which was recently studied in ArXiv:1206.2566v1, we present a comprehensive review of the SGF algorithm and the new updating scheme. We also discuss an optimized implementation of the updating scheme which allows for access to large system sizes.
View original:
http://arxiv.org/abs/1209.0946
No comments:
Post a Comment