Amplitude of Waves in the Kelvin-Wave Cascade

Abstract

Development of experimental techniques to study superfluid dynamics, in particular, application of nanomechanical oscillators to drive vortex lines, enables potential observation of the Kelvin-wave cascade on quantized vortices. One of the first questions that then arises in analysis of the experimental results is the relation between the energy flux in the cascade and the amplitude of the Kelvin waves. We provide such relation based on the L’vov—Nazarenko picture of the cascade. Remarkably, the dependence of the amplitude of the waves on the energy flux is extremely weak as a power law with an exponent of 1/10.

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Funding

The work was supported by the European Research Council under the European Union’s Horizon 2020 Research and Innovation Programme (grant agreement no. 694248).

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Correspondence to V. B. Eltsov.

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Eltsov, V.B., L’vov, V.S. Amplitude of Waves in the Kelvin-Wave Cascade. Jetp Lett. 111, 389–391 (2020). https://doi.org/10.1134/S0021364020070012

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