Dipolar Bose-Einstein condensates with dipole-dependent scattering length

Details Dipolar Bose-Einstein condensates with dipole-dependent scattering length Dipolar Bose-Einstein condensates with dipole-dependent scattering length

2006-05-11

arxiv.org/abs/cond-mat/0605315v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1103/PhysRevA.74.033611

We consider a Bose-Einstein condensate of polar molecules in a harmonic trap, where the effective dipole may be tuned by an external field. We demonstrate that taking into account the dependence of the scattering length on the dipole moment is essential to reproducing the correct energies and for predicting the stability of the condensate. We do this by comparing Gross-Pitaevskii calculations with diffusion Monte Carlo calculations. We find very good agreement between the results obtained by these two approaches once the dipole dependence of the scattering length is taken into account. We also examine the behavior of the condensate in non-isotropic traps.

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