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Annals of Physics

Monte Carlo method for the many-body scattering problem

Theoretical Physics

Published Apr 1, 1984• 0 citations
Publisher
DOI
10.1016/0003-4916(84)90149-0

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We predict a new kind of instability in a Bose-Einstein condensate composed of dipolar particles. Namely, a comparatively weak dipole moment can produce a large, negative two-body scattering length that can collapse the Bose-Einstein condensate. To verify this effect, we validate mean-field solutions to this problem using exact, diffusion Monte Carlo methods. We show that the diffusion Monte Carlo 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.