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

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 ${}^4\mathrm{He}$.

References in corpus (3)

• Finite Temperature Models of Bose-Einstein Condensation
• Dissipative dynamics of superfluid vortices at non-zero temperatures
• Anomalous translational velocity of vortex ring with finite-amplitude Kelvin waves

Cited by in corpus (11)

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• Dynamics of helical vortices and helical-vortex rings
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• Homogeneous Isotropic Superfluid Turbulence in Two Dimensions: Inverse and Forward Cascades in the Hall-Vinen-Bekharevich-Khalatnikov model
• Clustering and phase transitions in a 2D superfluid with immiscible active impurities
• Stochastic motion of finite-size immiscible impurities in a dilute quantum fluid at finite temperature
• Kelvin waves, mutual friction, and fluctuations in the Gross-Pitaevskii model