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Stable Multiring and Rotating Solitons in Two-Dimensional Spin-Orbit-Coupled Bose-Einstein Condensates with a
Yaroslav V Kartashov1,2, Dmitry A Zezyulin3
1ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain.
Physical Review Letters
|April 13, 2019
Summary
This study reveals stable, self-sustained states in spin-orbit-coupled Bose-Einstein condensates, including persistent rotating solitons with unique properties due to spin-orbit coupling.
Area of Science:
- Atomic physics
- Quantum mechanics
- Condensed matter physics
Background:
- Bose-Einstein condensates (BECs) are quantum states of matter.
- Spin-orbit coupling introduces unique spin-dependent forces.
- Radially periodic potentials create complex BEC structures.
Purpose of the Study:
- Investigate stable self-sustained states in 2D spin-orbit-coupled atomic BECs.
- Characterize vorticity-carrying modes and rotating solitons.
- Analyze the impact of spin-orbit coupling on soliton dynamics.
Main Methods:
- Numerical simulations of the Gross-Pitaevskii equation.
- Analysis of stability and properties of emergent states.
- Exploration of soliton collisions and interactions.
Main Results:
- Stable, multiring, vorticity-carrying states with varying topological charges were found.
- Solitons exhibiting persistent rotation were identified, stable for both repulsive and attractive interactions.
- Spin-orbit coupling led to distinct behaviors for clockwise and counterclockwise rotating solitons.
- Soliton collisions resulted in changes in rotation frequency dependent on phase differences.
Conclusions:
- Spin-orbit coupling enables novel stable states in atomic BECs.
- Rotating solitons possess unique characteristics influenced by spin-orbit interactions.
- The findings offer insights into controlling and manipulating quantum states in BECs.
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