A renormalized Gross-Pitaevskii Theory and vortices in a strongly interacting Bose gas

Details A renormalized Gross-Pitaevskii Theory and vortices in a strongly interacting Bose gas A renormalized Gross-Pitaevskii Theory and vortices in a strongly interacting Bose gas

2005-05-24

arxiv.org/abs/cond-mat/0505598v2

J. Phys. B: At. Mol. Opt. Phys. 40, 629 (2007)

Physics

Condensed Matter

Other Condensed Matter

13 pages, 5 figures; revision and extension, figure 2 added

Scientific paper

We consider a strongly interacting Bose-Einstein condensate in a spherical harmonic trap. The system is treated by applying a slave-boson representation for hard-core bosons. A renormalized Gross-Pitaevskii theory is derived for the condensate wave function that describes the dilute regime (like the conventional Gross-Pitaevskii theory) as well as the dense regime. We calculate the condensate density of a rotating condensate for both the vortex-free condensate and the condensate with a single vortex and determine the critical angular velocity for the formation of a stable vortex in a rotating trap.

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