Canonical Bose gas simulations with stochastic gauges

Abstract

A technique to simulate the grand canonical ensembles of interacting Bose gases is presented. Results are generated for many temperatures by averaging over energy-weighted stochastic paths, each corresponding to a solution of coupled Gross-Pitaevskii equations with phase-noise. The stochastic gauge method used relies on an off-diagonal coherent-state expansion, thus taking into account all quantum correlations. As an example, the second order spatial correlation function and momentum distribution for an interacting 1D Bose gas are calculated.

arXiv commentFour pages, two figures; typos corrected

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