TY - JOUR
T1 - Chaotic few-body vortex dynamics in rotating Bose-Einstein condensates
AU - Zhang, Tiantian
AU - Schloss, James
AU - Thomasen, Andreas
AU - O'Riordan, Lee James
AU - Busch, Thomas
AU - White, Angela
N1 - Publisher Copyright:
© 2019 American Physical Society.
PY - 2019/5
Y1 - 2019/5
N2 - We investigate a small vortex-lattice system of four corotating vortices in an atomic Bose-Einstein condensate and find that the vortex dynamics display chaotic behavior 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.
AB - We investigate a small vortex-lattice system of four corotating vortices in an atomic Bose-Einstein condensate and find that the vortex dynamics display chaotic behavior 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.
UR - http://www.scopus.com/inward/record.url?scp=85067107345&partnerID=8YFLogxK
U2 - 10.1103/PhysRevFluids.4.054701
DO - 10.1103/PhysRevFluids.4.054701
M3 - Article
SN - 2469-990X
VL - 4
JO - Physical Review Fluids
JF - Physical Review Fluids
IS - 5
M1 - 054701
ER -