2019
DOI: 10.1103/physrevfluids.4.054701
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Chaotic few-body vortex dynamics in rotating Bose-Einstein condensates

Abstract: 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 … Show more

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Cited by 6 publications
(7 citation statements)
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“…The machine learning model can also be straightforwardly integrated with a GPU solver of the Gross-Pitaevskii equation which would eliminate the need to transfer data between CPU and GPU [65]. As a possible next step the vortex detector could be combined with a tracking algorithm enabling the study of real-time dynamics of vortices in BECs such as in references [14,50,54].…”
Section: Discussionmentioning
confidence: 99%
See 3 more Smart Citations
“…The machine learning model can also be straightforwardly integrated with a GPU solver of the Gross-Pitaevskii equation which would eliminate the need to transfer data between CPU and GPU [65]. As a possible next step the vortex detector could be combined with a tracking algorithm enabling the study of real-time dynamics of vortices in BECs such as in references [14,50,54].…”
Section: Discussionmentioning
confidence: 99%
“…have a winding number with the same sign, which is determined by the rotation frequency Ω. Situations where vortices of different rotation directions co-exist can be created for instance by forcing the superfluid to flow around an obstacle potential [47,48] or through the process of phase imprinting [49,50,51,52,53]. In the latter case, a single vortex centered at (x 0 , y 0 ) is generated by applying a phase mask φ IMP (r) = arctan (y − y 0 , x − x 0 ) with a 2π phase winding in the desired direction.…”
Section: Physical Systemmentioning
confidence: 99%
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“…Vortices central role in superfluidity continues to attract theoretical and experimental interest in the macroscopic dynamics of these excitations. Early work focussed on studying the fundamental properties of the rotating system [13][14][15], while more recent work has focussed on understanding the effect of anisotropic trapping [16], vortex lattice [17,18], and chaotic [19] dynamics. Focus has also been on the structure and dynamics of vortices in condensates at finite temperature including non-equilibrium effects [20,21], multi-component systems which have been shown to possess a rich vortex physics [23][24][25][26][27][28] and the on-going quest to understand quantum turbulence [29,30].…”
Section: Introductionmentioning
confidence: 99%