Spatiotemporal vortex rings in atomic Bose–Einstein condensates
O.G. Chelpanova, Y.I. Kuriatnikov, S. Vilchinskii, and A.I. Yakimenko
Department of Physics, Taras Shevchenko National University of Kyiv 64/13 Volodymyrska Str., Kyiv 01601, Ukraine
Received March 1, 2019, published online June 26, 2019
We investigate spatiotemporal vortex rings with phase dislocation both in space and time. It is demonstrated that these structures naturally appear as a periodical in time edge phase dislocation at the low-density region of a perturbed atomic Bose–Einstein condensate. The condition of formation, dynamics and stability of the spatiotemporal vortex rings are investigated for repulsive and attractive interatomic interactions. These theoretical findings open up a perspective for experimental observation of novel type of topological coherent structures in ultracold gases.