Anomalous Attenuation of Transverse Sound in 3He

Abstract

We present the first measurements of the attenuation of transverse sound in superfluid 3He-B. We use fixed path length interferometry combined with the magneto-acoustic Faraday effect to vary the effective path length by a factor of two, resulting in absolute values of the attenuation. We find that attenuation is significantly larger than expected from the theoretical dispersion relation, in contrast to the phase velocity of transverse sound. We suggest that the anomalous attenuation can be explained by surface Andreev bound states.

4 pages, 5 figures, accepted to Phys. Rev. Lett

References in corpus (5)

• Thermodynamic properties of thin films of superfluid 3He-A
• Surface Specific Heat of ${}^3$He and Andreev Bound States
• Discovery of an Excited Pair State in Superfluid 3He
• Collective Modes and f-wave Pairing Interactions in Superfluid 3He
• Magneto-Acoustic Spectroscopy in Superfluid 3He-B

Cited by in corpus (7)

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• Low-temperature environments for quantum computation and quantum simulation
• Transport of bound quasiparticle states in a two-dimensional boundary superfluid
• Locally gauge-invariant spin response of ${}^3$He-$B$ films with Majorana surface states
• Subgap in the surface bound states spectrum of Superfluid ${}^3$He-B with Rough Surface
• Music of the spheres: sound emitted by the bubbles in liquid helium