Physics – Condensed Matter – Quantum Gases
Scientific paper
2009-06-23
Phys. Rev. A 79, 063622 (2009)
Physics
Condensed Matter
Quantum Gases
10 pages with 9 figures
Scientific paper
10.1103/PhysRevA.79.063622
We present full three-dimensional numerical calculations of single vortex states in rotating dipolar condensates. We consider a Bose-Einstein condensate of 52Cr atoms with dipole-dipole and s-wave contact interactions confined in an axially symmetric harmonic trap. We obtain the vortex states by numerically solving the Gross-Pitaevskii equation in the rotating frame with no further approximations. We investigate the properties of a single vortex and calculate the critical angular velocity for different values of the s-wave scattering length. We show that, whereas the standard variational approach breaks down in the limit of pure dipolar interactions, exact solutions of the Gross-Pitaevskii equation can be obtained for values of the s-wave scattering length down to zero. The energy barrier for the nucleation of a vortex is calculated as a function of the vortex displacement from the rotation axis for different values of the angular velocity of the rotating trap.
Abad Marta
Guilleumas Montserrat
Jezek Dora M.
Mayol Ricardo
Pi Marti
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