3 papers
nlin.PS2019
Spontaneous and engineered transformations of topological structures in nonlinear media with gain and loss
B. A. Kochetov, O. G. Chelpanova, V. R. Tuz +1
In contrast to conservative systems, in nonlinear media with gain and loss the dynamics of localized topological structures can exhibit unique features that can be controlled exter…
cond-mat.quant-gas2019
Spatiotemporal vortex rings in atomic Bose-Einstein condensates
O. G. Chelpanova, Y. I. Kuriatnikov, S. Vilchinskii +1
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 pha…
cond-mat.quant-gas2018
Analogues of Josephson junctions and black hole event horizons in atomic Bose-Einstein condensates
A. I. Yakimenko, O. I. Matsyshyn, A. O. Oliinyk +3
We study dynamical processes in coherently coupled atomic Bose-Einstein condensates. Josephson effects in ring-shaped and dumbbell geometries are theoretically investigated. Condit…