Acoustic order parameter three-wave resonance in superfluid 3He-B

R. H. Mc Kenzie, J. A. Sauls

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


We consider the nonlinear interaction of zero sound with the collective modes of the order parameter in superfluid 3He-B. Starting from the quasi-classical theory of superfluid 3He, we derive equations describing a three-wave resonance between the J = 2+ (real squashing) modes and two zero-sound phonons at different frequencies. We point out similarities between the nonlinear excitation of collective modes of the 3He-B order parameter and related effects in nonlinear optical systems. In particular, it should be possible to observe stimulated Raman scattering of zero sound and two-phonon absorption by the 2+ mode.

Original languageEnglish (US)
Pages (from-to)459-464
Number of pages6
Issue number5
StatePublished - Jul 1 1989

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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