Ring dark solitons and vortex necklaces in Bose-Einstein condensates |
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Authors: | Theocharis G Frantzeskakis D J Kevrekidis P G Malomed B A Kivshar Yuri S |
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Institution: | Department of Physics, University of Athens, Panepistimiopolis, Zografos, Athens 15784, Greece. |
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Abstract: | We introduce the concept of ring dark solitons in Bose-Einstein condensates. We show that relatively shallow rings are not subject to the snake instability, but a deeper ring splits into a robust ringlike cluster of vortex pairs, which performs oscillations in the radial and azimuthal directions, following the dynamics of the original ring soliton. |
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