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

Ch. Moseley·K. Ziegler
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Abstract

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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Ch. Moseley, K. Ziegler. 2007-01-23. A renormalized Gross-Pitaevskii Theory and vortices in a strongly interacting Bose gas. https://doi.org/10.1088/0953-4075%2F40%2F3%2F017

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