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Updated: May 16, 2026

Scanning SQUID Study of Vortex Manipulation by Local Contact
Published on: February 1, 2017
Vortex-density fluctuations, energy spectra, and vortical regions in superfluid turbulence
Andrew W Baggaley1, Jason Laurie, Carlo F Barenghi
1School of Mathematics and Statistics, University of Glasgow, Glasgow G12 8QW, United Kingdom. andrew.baggaley@gla.ac.uk
Abstract:
Measurements of the energy spectrum and of the vortex-density fluctuation spectrum in superfluid turbulence seem to contradict each other. Using a numerical model, we show that at each instance of time the total vortex line density can be decomposed into two parts: one formed by metastable bundles of coherent vortices, and one in which the vortices are randomly oriented. We show that the former is responsible for the observed Kolmogorov energy spectrum, and the latter for the spectrum of the vortex line density fluctuations.
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