Exact hydrodynamics of a trapped dipolar Bose-Einstein condensate

Details Exact hydrodynamics of a trapped dipolar Bose-Einstein condensate Exact hydrodynamics of a trapped dipolar Bose-Einstein condensate

2003-08-05

arxiv.org/abs/cond-mat/0308096v1

Physical Review Letters 92, 250401 (2004)

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.92.250401

We derive the exact density profile of a harmonically trapped Bose-Einstein condensate (BEC) which has dipole-dipole interactions as well as the usual s-wave contact interaction, in the Thomas-Fermi limit. Remarkably, despite the non-local anisotropic nature of the dipolar interaction, the density turns out to be an inverted parabola, just as in the pure s-wave case, but with a modified aspect ratio. The ``scaling'' solution approach of Kagan, Surkov, and Shlyapnikov [Phys. Rev. A 54, 1753 (1996)] and Castin and Dum [Phys. Rev. Lett. 77}, 5315 (1996)] for a BEC in a time-dependent trap can therefore be applied to a dipolar BEC, and we use it to obtain the exact monopole and quadrupole shape oscillation frequencies.

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