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Journal of Low Temperature Physics

, Volume 91, Issue 1–2, pp 13–37 | Cite as

Transverse waves in superfluid3He-B

  • G. F. Moores
  • J. A. Sauls
Article

Abstract

We examine the theory of collisionless transverse current waves in bulk superfluid3He-B, including the coupling to the order parameter collective modes. At low frequencies, Ω ≪ δ(T), the order parameter modes do not contribute to the restoring force for a transverse current, and the quasiparticle contribution drops rapidly as the gap in the spectrum develops. Thus, low-frequency transverse sound becomes overdamped at temperatures nearT c . However, at low temperatures (T ≲0.3T c ) the off-resonant coupling to the J = 2−,M = +-1 modes stabilizes a propagating transverse current mode, with a large phase velocity and low damping for frequencies above a critical frequency that is approximately that of theJ = 2 − mode. We also discuss the similarities and differences of longitudinal and transverse sound in the superfluid phases. For example, in zero field, right- and left-circularly polarized waves are degenerate. A magnetic field, with\(\overrightarrow \operatorname{H}||\overrightarrow {\text{q}}\), lifts this degeneracy, giving rise to the analog of circular dichroism and birefringence of electromagnetic waves. Thus, transverse waves may be more easily detected in the B-phase than in normal3He.

Keywords

Transverse Wave Phase Velocity Collective Mode Zero Sound Transverse Current 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Plenum Publishing Corporation 1993

Authors and Affiliations

  • G. F. Moores
    • 1
  • J. A. Sauls
    • 1
  1. 1.Department of Physics & AstronomyNorthwestern UniversityEvanston

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