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Collective Excitations and Fermi-Liquid Effects in 4HE and 3He-4He Films

  • E. Krotscheck
  • C. J. Tymczak
Part of the NATO ASI Series book series (NSSB, volume 257)

Abstract

This contribution reports on recent progress in the development of a uniform picture for non-uniform quantum many-body systems. We give a brief account of the optimized Hypernetted-Chain (HNC/EL) theory and its implementation for non-uniform systems. The theory is applied to films of 4He atoms adsorbed to a substrate and to 3He-4He mixture films. We discuss the structure of collective excitations and their transition from the thin, surface-mode dominated to the thick, zero-sound dominated films. We calculate properties of 3He-impurities in the films and study the interaction of such atoms with both the background and other impurities.

Keywords

Helium Atom Collective Excitation Dispersion Branch Dynamic Structure Function Quasiparticle Interaction 
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

© Plenum Press, New York 1991

Authors and Affiliations

  • E. Krotscheck
    • 1
  • C. J. Tymczak
    • 1
  1. 1.Center for Theoretical Physics, Department of PhysicsTexas A&M UniversityCollege StationUSA

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