Chaotic few-body vortex dynamics in rotating Bose--Einstein condensates
| Autor: | Andreas Thomasen, James Schloss, Thomas Busch, Angela White, L. ORiordan, Tiantian Zhang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Quantum Physics Computational Mechanics Chaotic FOS: Physical sciences Vorticity Rotation Nonlinear Sciences - Chaotic Dynamics Vortex law.invention Superfluidity Nonlinear Sciences::Chaotic Dynamics Classical mechanics law Quantum Gases (cond-mat.quant-gas) Modeling and Simulation Condensed Matter::Superconductivity Chaotic Dynamics (nlin.CD) Condensed Matter - Quantum Gases Quantum Physics (quant-ph) Event (particle physics) Quantum Bose–Einstein condensate |
| DOI: | 10.48550/arxiv.1812.04759 |
| Popis: | We investigate a small vortex-lattice system of four co-rotating vortices in an atomic Bose--Einstein condensate and find that the vortex dynamics display chaotic behaviour after a system quench introduced by reversing the direction of circulation of a single vortex through a phase-imprinting process. By tracking the vortex trajectories and Lyapunov exponent, we show the onset of chaotic dynamics is not immediate, but occurs at later times and is accelerated by the close-approach and separation of all vortices in a scattering event. The techniques we develop could potentially be applied to create locally induced chaotic dynamics in larger lattice systems as a stepping stone to study the role of chaotic events in turbulent vortex dynamics. Comment: 7 pages, 5 figures, supplementary video |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|