Interaction of ring dark solitons with ring impurities in Bose–Einstein condensates
Xue, Ju-Kui; Xue, Ju-Kui; Physics and Electronics Engineering College, Northwest Normal University, Lanzhou, 730070, People's Republic of China
Журнал:
Journal of Physics B: Atomic, Molecular and Optical Physics
Дата:
2005-03-28
Аннотация:
The interaction of ring dark solitons/vortexes with the ring-shaped repulsive and attractive impurities in two-dimensional Bose–Einstein condensates is investigated numerically. Very rich interaction phenomena are obtained, i.e., not only the interaction between the ring soliton and the impurity, but also the interaction between vortexes and the impurity. The interaction characters, i.e., snaking of ring soliton, quasitrapping or reflection of ring soliton and vortexes by the impurity, strongly depend on initial ring soliton velocity, impurity strength, initial position of ring soliton and impurity. The numerical results also reveal that ring dark solitons/vortexes can be trapped and dragged by an adiabatically moving attractive ring impurity.
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