Phonons in magnon superfluid and symmetry breaking field

Abstract

Recent experiments [1],[2] which measured the spectrum of the Goldstone collective mode of coherently precessing state in 3He-B are discussed using the presentation of the coherent spin precession in terms of the Bose-Einstein condensation of magnons. The mass in the spectrum of the Goldstone boson -- phonon in the superfluid magnon liquid -- is induced by the symmetry breaking field, which is played by the RF magnetic field

arXiv comment2 pages, JETP Letters style, no figures, version accepted in JETP Letters

References in corpus (1)

• Bose-Einstein condensation of magnons in superfluid 3He

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• Conventional magnon BEC in YIG film