Annihilation of vortex dipoles in an oblate Bose–Einstein condensate
Annihilation of vortex dipoles in an oblate Bose–Einstein condensate
We theoretically explore the annihilation of vortex dipoles, generated when an obstacle moves through an oblate Bose–Einstein condensate, and examine the energetics of the annihilation event. We show that the grey soliton, which results from the vortex dipole annihilation, is lower in energy than the vortex dipole. We also investigate …