2002/12/25 by G. M. Kavoulakis, George Kavoulakis, Gordon Baym · 5 citations
Physics and Astronomy · #Anharmonicity #Bose–Einstein condensate #Classical mechanics #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Ground state #Lattice (music) #Mechanics #Phase (matter) #Phase diagram #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quantum, superfluid, helium dynamics #Quartic function #Superfluidity #Vortex #cond-mat.stat-mech
paper · pdf · doi:10.1088/1367-2630/5/1/351
published as New Journal of Physics, 5 (2003) 51.1 · 5 pages, 5 figures
arxiv created 2002/12/25 · openalex publication_date 2003/05/30 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.