Vortex rings and vortex ring solitons in shaken BoseEinstein condensate
Abstract
In a shaken BoseEinstein condensate, confined in a vibrating trap, there can appear different nonlinear coherent modes. Here we concentrate on two types of such coherent modes, vortex ring solitons and vortex rings. In a cylindrical trap, vortex ring solitons can be characterized as nonlinear HermiteLaguerre modes, whose description can be done by means of optimized perturbation theory. The energy, required for creating vortex ring solitons, is larger than that needed for forming vortex rings. This is why, at a moderate excitation energy, vortex rings appear before vortex ring solitons. The generation of vortex rings is illustrated by numerical simulations for trapped ^{87}Rb atoms.
 Publication:

Journal of Physics Conference Series
 Pub Date:
 February 2016
 DOI:
 10.1088/17426596/691/1/012019
 arXiv:
 arXiv:1603.02919
 Bibcode:
 2016JPhCS.691a2019Y
 Keywords:

 Condensed Matter  Quantum Gases
 EPrint:
 latex file, 10 pages, 4 figures