Canonical Bose gas simulations with stochastic gauges

Details Canonical Bose gas simulations with stochastic gauges Canonical Bose gas simulations with stochastic gauges

2003-08-12

arxiv.org/abs/cond-mat/0308219v2

Phys. Rev. Lett. 92, 040405 (2004)

Physics

Condensed Matter

Soft Condensed Matter

Four pages, two figures; typos corrected

Scientific paper

10.1103/PhysRevLett.92.040405

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.

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