Role of the two-roton bound state in neutron scattering on superfluid 4He

I. Tutto, A. Zawadowski

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

It is shown that due to the hybridisation between the one-particle excitation and the two-roton states in superfluid 4He the interaction between the rotons is characterised by an affective roton-roton coupling g 4eff instead of the bare roton-roton coupling. The magnitude of this interaction, estimated from the neutron scattering measurements at momentum transfer between 2.4 AA-1 and 3.5 AA-1, is g 4eff approximately=-1*10-38 erg cm3 and therefore the neutron scattering measurements show the existence of the two-roton bound state even at large momentum values.

Original languageEnglish
Article number006
Pages (from-to)L385-L388
JournalJournal of Physics C: Solid State Physics
Volume11
Issue number9
DOIs
Publication statusPublished - Dec 1 1978

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Engineering(all)
  • Physics and Astronomy(all)

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