Comparison of mean-field theories for vortices in trapped Bose-Einstein condensates

Details Comparison of mean-field theories for vortices in trapped Bose-Einstein condensates Comparison of mean-field theories for vortices in trapped Bose-Einstein condensates

2001-08-28

arxiv.org/abs/cond-mat/0108462v1

J. Phys.: Condens. Matter 13 (2001) L819-L824

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 2 figures

Scientific paper

10.1088/0953-8984/13/36/101

We compute structures of vortex configurations in a harmonically trapped Bose-Einstein condensed atom gas within three different gapless self-consistent mean-field theories. Outside the vortex core region, the density profiles for the condensate and the thermal gas are found to differ only by a few percent between the Hartree-Fock-Bogoliubov-Popov theory and two of its recently proposed gapless extensions. In the core region, however, the differences in the density profiles are substantial. The structural differences are reflected in the energies of the quasiparticle states localized near the vortex core. Especially, the predictions for the energy of the lowest quasiparticle excitation differ considerably between the theoretical models investigated.

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