title: Gaussian quantum Monte Carlo methods for fermions and bosons.
abstract: We introduce a new class of quantum Monte Carlo methods, based on a Gaussian quantum operator representation of fermionic states. The methods enable first-principles dynamical or equilibrium calculations in many-body Fermi systems, and, combined with the existing Gaussian representation for bosons, provide a unified method of simulating Bose-Fermi systems. As an application relevant to the Fermi sign problem, we calculate finite-temperature properties of the two dimensional Hubbard model and the dynamics in a simple model of coherent molecular dissociation.
authors.affiliation: ARC Centre of Excellence for Quantum-Atom Optics, University of Queensland, Brisbane 4072, Queensland, Australia.
authors.forename: J F
authors.initials: JF
authors.lastname: Corney
authors.forename: P D
authors.initials: PD
authors.lastname: Drummond