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Evidence for Magnon BEC in Superfluid 3He-A

  • P. Hunger
  • Y. M. Bunkov
  • E. Collin
  • H. Godfrin
Article

Abstract

The phenomenon of phase-coherent precession of magnetization in superfluid 3He and the related effects of spin superfluidity are based on the true Bose-Einstein condensation of magnons. Several different states of coherent precession have been observed in 3He-B: homogeneously precessing domain (HPD); persistent signal formed by Q-balls at very low temperatures; coherent precession with fractional magnetization; and two new modes of coherent precession in compressed aerogel. Here we present evidence of magnons Bose-Einstein condensation in 3He-A in a compressed aerogel.

Keywords

Superfluid 3He Aerogel Magnons Bose-Einstein condensation 

PACS

67.57.Fg 05.45.Yv 11.27.+d 

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • P. Hunger
    • 1
  • Y. M. Bunkov
    • 1
  • E. Collin
    • 1
  • H. Godfrin
    • 1
  1. 1.MCBT, Institut NéelCNRS et Université Joseph FourierGrenoble Cedex 9France

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