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Lookup NU author(s): Dr Gary LiuORCiD, Dr Andrew BaggaleyORCiD, Emeritus Professor Carlo Barenghi, Dr Toby WoodORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2025. The Author(s). Published by the American Astronomical Society. We simulate the dynamics of about 600 quantum vortices in a spinning-down cylindrical container using a Gross-Pitaevskii model. For the first time, we find convincing spatial-temporal evidence of avalanching behavior resulting from vortex depinning and collective motion. During a typical avalanche, about 10-20 vortices exit the container in a short period, producing a glitch in the superfluid angular momentum and a localized void in the vorticity. After the glitch, vortices continue to depin and circulate around the vorticity void in a similar manner to that seen in previous point-vortex simulations. We present evidence of collective vortex motion throughout this avalanche process. We also show that the effective Magnus force can be used to predict when and where avalanches will occur. Finally, we comment on the challenge of extrapolating these results to conditions in real neutron stars, which contain many orders of magnitude more vortices.
Author(s): Liu I-K, Baggaley AW, Barenghi CF, Wood TS
Publication type: Article
Publication status: Published
Journal: Astrophysical Journal
Year: 2025
Volume: 984
Issue: 1
Print publication date: 01/05/2025
Online publication date: 29/04/2025
Acceptance date: 21/02/2025
Date deposited: 13/05/2025
ISSN (print): 0004-637X
ISSN (electronic): 1538-4357
Publisher: Institute of Physics
URL: https://doi.org/10.3847/1538-4357/adc383
DOI: 10.3847/1538-4357/adc383
Data Access Statement: Data supporting this publication can be openly accessed under an "Open Data Commons Open Database License" (CC BY 4.0) via doi:10.25405/data.ncl.25590531.v1
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