Journal
PHYSICAL REVIEW LETTERS
Volume 122, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.122.123201
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Funding
- Ministry of Education and Science of Russian Federation [14.Y26.31.0015]
- Government of Russian Federation [08-08]
- Severo Ochoa program of the Government of Spain [SEV-2015-0522]
- Fundacio Cellex
- Generalitat de Catalunya
- CERCA
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We consider two-dimensional spin-orbit-coupled atomic Bose-Einstein condensate in a radially periodic potential. The system supports different types of stable self-sustained states including radially symmetric vorticity-carrying modes with different topological charges in two spinor components that may have multiring profiles and at the same time remain remarkably stable for repulsive interactions. Solitons of the second type show persistent rotation with constant angular frequency. They can be stable for both repulsive and attractive interatomic interactions. Because of the inequivalence between clockwise and counter-clockwise rotation directions introduced by spin-orbit coupling, the properties of such solitons strongly differ for positive and negative rotation frequencies. The collision of solitons located in the same or different rings is accompanied by a change of the rotation frequency that depends on the phase difference between colliding solitons.
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