Journal of Statistical Physics

, Volume 23, Issue 4, pp 405–442 | Cite as

On the equation of state of classical one-component systems with long-range forces

  • Ph. Choquard
  • P. Favre
  • Ch. Gruber


Several definitions of the “pressure” are introduced for one-component systems and shown to be nonequivalent in the presence of a rigid neutralizing background. Relations between these pressures are derived for finite and infinite systems; these relations depend on the asymptotic behavior of the force at infinity, with the Coulomb force at the borderline between different properties. It is argued that only one of those definitions is physically acceptable and its properties are discussed in relation to the asymptotic behavior of the force. It is seen in particular that a knowledge of the state of the infinite system is not sufficient to determine its thermodynamic properties. The results are illustrated by some typical examples.

Key words

Long-range forces equilibrium states BBGKY equation equation of state one-component plasma shape dependence 


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Copyright information

© Plenum Publishing Corporation 1980

Authors and Affiliations

  • Ph. Choquard
    • 1
  • P. Favre
    • 1
  • Ch. Gruber
    • 1
  1. 1.Laboratoire de Physique TheoriqueEcole Polytechnique Fédérale de LausanneLausanneSwitzerland

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