G M Kavoulakis and Gordon Baym 2003 New J. Phys. 5 51 doi:10.1088/1367-2630/5/1/351
G M Kavoulakis1 and Gordon Baym2,3
Show affiliationsRapidly 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.
Issue 1 (May 2003)
Received 7 January 2003
Published 30 May 2003
G M Kavoulakis and Gordon Baym 2003 New J. Phys. 5 51
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