van der Waals revisited

  • Bärwinkel K
  • Schnack J
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Abstract

The van-der-Waals version of the second virial coefficient is not far from being exact if the model parameters are appropriately chosen. It is shown how the van-der-Waals resemblance originates from the interplay of thermal averaging and superposition of scattering phase shift contributions. The derivation of the two parameters from the quantum virial coefficient reveals a fermion-boson symmetry in non-ideal quantum gases. Numerical details are worked out for the Helium quantum gases. © 2008 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Fermion-boson symmetry
  • Kinetic theory
  • Quasi-particle methods
  • van der Waals model

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Authors

  • Klaus Bärwinkel

  • Jürgen Schnack

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