Quasiparticle Damping of Surface Waves in Superfluid \(^3\)He and \(^4\)He

Oscillations on free surface of superfluids at the inviscid limit are damped by quasiparticle scattering. We have studied this effect in both superfluids \(^3\)He and \(^4\)He deep below the respective critical temperatures. Surface oscillators offer several benefits over immersed mechanical oscilla...

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Bibliographic Details
Published in:arXiv.org 2014-10
Main Authors: Manninen, Matti S, Rysti, Juho, Todoshchenko, Igor, Tuoriniemi, Juha
Format: Article
Language:English
Subjects:
Damping
Fluids
Free surfaces
Mechanical oscillators
Scattering
Superfluidity
Surface waves
Online Access:Get full text
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Summary:Oscillations on free surface of superfluids at the inviscid limit are damped by quasiparticle scattering. We have studied this effect in both superfluids \(^3\)He and \(^4\)He deep below the respective critical temperatures. Surface oscillators offer several benefits over immersed mechanical oscillators traditionally used for similar purposes. Damping is modeled as specular scattering of ballistic quasiparticles from the moving free surface. The model is in reasonable agreement with our measurements for superfluid \(^4\)He but significant deviation is found for \(^3\)He.
ISSN:2331-8422
DOI:10.48550/arxiv.1410.4071