Vortex Dipole in a BEC with dipole-dipole interaction
  We consider single and multiply charged quantized vortex dipole in an oblate dipolar Bose Einstein condensate in the Thomas-Fermi (TF) regime. We calculate the critical velocity for the formation of a pair of vortices of opposite charge. We find that dipolar interactions decrease the critical velocity for a vortex dipole nucleation. 
Cem Yuce, Zuleyha Oztas
cond-mat.quant-gas