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arXiv · 1006.4315

Anomalous vortex ring velocities induced by thermally-excited Kelvin waves and counterflow effects in superfluids

Giorgio Krstulovic·Marc Brachet
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Abstract

Dynamical counterflow effects on vortex evolution under the truncated Gross-Pitaevskii equation are investigated. Standard longitudinal mutual friction effects are produced and a dilatation of vortex rings is obtained at large counterflow. A strong temperature-dependent anomalous slowdown of vortex rings is observed and attributed to the presence of thermally exited Kelvin waves. This generic effect of finite-temperature superfluids is estimated using energy equipartition and orders of magnitude are given for weakly interacting Bose-Einstein condensates and superfluid $^4{\rm He}$.

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Giorgio Krstulovic, Marc Brachet. 2011-02-12. Anomalous vortex ring velocities induced by thermally-excited Kelvin waves and counterflow effects in superfluids. https://doi.org/10.1103/physrevb.83.132506

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