Dipolar Bose gases: Many-body versus mean-field description

Details Dipolar Bose gases: Many-body versus mean-field description Dipolar Bose gases: Many-body versus mean-field description

2006-04-19

arxiv.org/abs/cond-mat/0604432v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

We characterize zero-temperature dipolar Bose gases under external spherical confinement as a function of the dipole strength using the essentially exact many-body diffusion Monte Carlo (DMC) technique. We show that the DMC energies are reproduced accurately within a mean-field framework if the variation of the s-wave scattering length with the dipole strength is accounted for properly. Our calculations suggest stability diagrams and collapse mechanisms of dipolar Bose gases that differ significantly from those previously proposed in the literature.

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