Bulletin of the American Physical Society
54th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 68, Number 7
Monday–Friday, June 5–9, 2023; Spokane, Washington
Session N01: Poster Session II (4:00pm-6:00pm, PT)
4:00 PM,
Wednesday, June 7, 2023
Room: Exhibit Hall C
Abstract: N01.00113 : Superfluid shear layer turbulence realised through machine learning optimisation*
Presenter:
Tyler W Neely
(University of Queensland)
Authors:
Simeon Simjanovski
(University of Queensland)
Tyler W Neely
(University of Queensland)
Guillaume Gauthier
(University of Queensland)
Matthew J Davis
(Univ of Queensland)
Halina Rubinsztein-Dunlop
(University of Queensland)
After preparing the optimised persistent current state, we study the dynamics of the system after in-trap interference. The interaction between the rotating and stationary superfluids realises a shear layer that rapidly decays, resulting in a ring of quantised vortices. This vortex ring is unstable and decays into vortex clusters, indicative of the superfluid Kelvin-Helmholtz instability [2]. By studying the cluster sizes with increasing hold time, we find analogous behaviour to decaying classical 2D turbulence.
[1] G. Gauthier, I. Lenton, N. McKay Parry, M. Baker, M. J. Davis, H. Rubinsztein-Dunlop, and T. W. Neely, Optica 3, 1136–1143 (2016).
[2] A. W. Baggaley and N. G. Parker. Kelvin-Helmholtz instability in a single-component atomic superfluid. Phys. Rev. A 97 053608 (2018).
*Australian Research Council (ARC) Centre of Excellence for Engineered Quantum Systems (EQUS, CE170100009), and ARC Discovery Projects Grant No. DP160102085, ARC Future Fellowship No. FT190100306, Australian Government Research and Training Program Scholarship.
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