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Elementary Excitations in Liquid Helium

  • Chia-Wei Woo

Abstract

Recently certain controversies have arisen over the form and direction of the phonon dispersion and the nature of the two-roton excitation in liquid helium. From the standpoint both of theoretical elegance and of satisfactorily interpreting experimental data in a way consistent with sum rules, it is highly desirable to develop a theory which accounts for the two branches of excitations on equal footing, at least in the limit of long wavelengths. We discuss here such an attempt. It is a microscopic theory based on a generalization of Feynman’s treatment of the phonon-roton spectrum.

Keywords

Liquid Helium Phonon Dispersion Elementary Excitation Trial Wave Function Dynamic Structure Function 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1974

Authors and Affiliations

  • Chia-Wei Woo
    • 1
  1. 1.Department of PhysicsNorthwestern UniversityEvanstonUSA

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