Giant vortices in combined harmonic and quartic traps

Details Giant vortices in combined harmonic and quartic traps Giant vortices in combined harmonic and quartic traps

2003-09-29

arxiv.org/abs/cond-mat/0309668v1

Phys Rev A, 69, 033608, 2004

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevA.69.033608

We consider a rotating Bose-Einstein condensate confined in combined harmonic and quartic traps, following recent experiments [V. Bretin, S. Stock, Y. Seurin and J. Dalibard, cond-mat/0307464]. We investigate numerically the behavior of the wave function which solves the three-dimensional Gross Pitaevskii equation. When the harmonic part of the potential is dominant, as the angular velocities $Omega$ increases, the vortex lattice evolves into a giant vortex. We also investigate a case not covered by the experiments or the previous numerical works: for strong quartic potentials, the giant vortex is obtained for lower $Omega$, before the lattice is formed. We analyze in detail the three dimensional structure of vortices.

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