Theory of structure in the superfluid helium spectrum considering roton-roton resonances

J. Ruvalds, A. Zawadowski

Research output: Contribution to journalArticle

88 Citations (Scopus)

Abstract

Interactions between excitations in superfluid helium are investigated by Green's function techniques. In our model, a sharp peak appears in the two-excitation spectrum corresponding to a resonance of two rotons. Interaction of the resonance with the single-particle spectrum results in a hybridization and splitting of the one-particle spectrum into two distinct branches. These theoretical results are in agreement with recent neutronscattering and Raman-scattering experiments.

Original languageEnglish
Pages (from-to)333-337
Number of pages5
JournalPhysical Review Letters
Volume25
Issue number6
DOIs
Publication statusPublished - 1970

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rotons
helium
excitation
Green's functions
interactions
Raman spectra

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Theory of structure in the superfluid helium spectrum considering roton-roton resonances. / Ruvalds, J.; Zawadowski, A.

In: Physical Review Letters, Vol. 25, No. 6, 1970, p. 333-337.

Research output: Contribution to journalArticle

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