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Preuves de l'existence d'un condensat Bose-Einstein dans l'hélium 4 liquide obtenu lors de l'évaporation quantique.

Evidence for a Bose-Einstein condensate in liquid helium 4 from quantum evaporation.

Auteurs : WYATT A. F. G.

Type d'article : Article

Résumé

Bose-Einstein condensation is a purely quantum phenomenon whereby a macroscopic number of identical atoms occupy the same single-particle state. Liquid helium 4 is generally accepted to have such a condensate. The current issue is not whether there is a condensate in this system, but how to demonstrate its existence in a clear and simple way. An earlier measurement of evaporation from liquid helium 4 caused by a collimated beam of phonons provides such a demonstration. This process of quantum evaporation also opens the possibility for creating beams of phase-coherent atoms of short wavelength.

Détails

  • Titre original : Evidence for a Bose-Einstein condensate in liquid helium 4 from quantum evaporation.
  • Identifiant de la fiche : 1999-1365
  • Langues : Anglais
  • Source : Nature - vol. 391 - n. 6662
  • Date d'édition : 01/01/1998
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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