Quasiparticle damping of surface waves in superfluid 3He and 4He

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Oscillations on free surfaces of superfluids at the inviscid limit are damped by quasiparticle scattering. We study this effect in both superfluid 3He and superfluid 4He, 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 4He but significant deviation is found for 3He.


Original languageEnglish
Article number224502
Pages (from-to)1-4
JournalPhysical Review B
Issue number22
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

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