Quasiparticle Interactions in Many-Body Systems

  • J. Ruvalds
Conference paper


A survey of recent developments in the study of interacting elementary excitations is presented. The general features of the formalism are discussed in the formation of bound states of quasiparticles, and their possible hybridization with other excitations. The relevant theoretical features and their relation to experimental data are briefly discussed for phonons in solids, rotons in liquid helium, spin waves, and plasmon excitations in an electron gas.


Liquid Helium Spin Wave Elementary Excitation Superfluid Helium Plasmon Excitation 
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Copyright information

© Plenum Press, New York 1976

Authors and Affiliations

  • J. Ruvalds
    • 1
  1. 1.Physics DepartmentUniversity of VirginiaCharlottesvilleUSA

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