Depletion of a Bose-Einstein condensate by laser-iduced dipole-dipole interactions

Details Depletion of a Bose-Einstein condensate by laser-iduced dipole-dipole interactions Depletion of a Bose-Einstein condensate by laser-iduced dipole-dipole interactions

2003-10-28

arxiv.org/abs/cond-mat/0310672v2

Physics

Condensed Matter

Soft Condensed Matter

10 pages, 6 figures

Scientific paper

10.1088/0953-4075/37/7/061

We study a gaseous Bose-Einstein condensate with laser-induced dipole-dipole interactions using the Hartree-Fock-Bogoliubov theory within the Popov approximation. The dipolar interactions introduce long-range atom-atom correlations, which manifest themselves as increased depletion at momenta similar to that of the laser wavelength, as well as a "roton" dip in the excitation spectrum. Surprisingly, the roton dip and the corresponding peak in the depletion are enhanced by raising the temperature above absolute zero.

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