Publication Date

2004

Journal or Book Title

Physics Review B

Abstract

For some models of interacting fermions the known solution to the notorious sign problem in Monte Carlo (MC) simulations is to work with macroscopic fermionic determinants; the price, however, is a macroscopic scaling of the numerical effort spent on elementary local updates. We find that the ratio of two macroscopic determinants can be found with any desired accuracy by considering truncated (local in space and time) matices. In this respect, MC for interacting fermionic systems becomes similar to that for the sign-problem-free bosonic systems with system-size independent update cost. We demonstrate the utility of the truncated-determinant method by simulating the attractive Hubbard model within the MC scheme based on partially summed Feynman diagrams. We conjecture that similar approach may be useful in other implementations of the sign-free determinant schemes.

Comments

This is the pre-published version harvested from ArXiv. The published version is located at http://prb.aps.org/abstract/PRB/v70/i19/e193101

Volume

70

Issue

19

Download

Included in

Physics Commons

Share

COinS