Nonexistence of scattering theory at finite temperature

  • H. Narnhofer
Conference paper
Part of the Lecture Notes in Physics book series (LNP, volume 396)


We discuss the concept of scattering theory for finite temperature states. We demand that the Hamiltonian is unitarily equivalent to a free Hamiltonian with respect to quasiparticles. For translation invariant finite temperature states it is shown that if quasiparticles exist, they do not allow any freedom to distinguish between past and future particles and to find a scattering mechanism.


Annihilation Operator Single Particle State Outgoing Particle Bogoliubov Transformation Hilbert Algebra 
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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • H. Narnhofer
    • 1
  1. 1.Institut für Theoretische PhysikUniversität WienGermany

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