Rapidly rotating Bose-Einstein condensates in anharmonic potentials

Details Rapidly rotating Bose-Einstein condensates in anharmonic potentials Rapidly rotating Bose-Einstein condensates in anharmonic potentials

2002-12-25

arxiv.org/abs/cond-mat/0212596v1

New Journal of Physics, 5 (2003) 51.1

Physics

Condensed Matter

Statistical Mechanics

5 pages, 5 figures

Scientific paper

10.1088/1367-2630/5/1/351

Rapidly rotating Bose-Einstein condensates confined in anharmonic traps can exhibit a rich variety of vortex phases, including a vortex lattice, a vortex lattice with a hole, and a giant vortex. Using an augmented Thomas-Fermi variational approach to determine the ground state of the condensate in the rotating frame -- valid for sufficiently strongly interacting condensates -- we determine the transitions between these three phases for a quadratic-plus-quartic confining potential. Combining the present results with previous numerical simulations of small rotating condensates in such anharmonic potentials, we delineate the general structure of the zero temperature phase diagram.

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