Existence and uniqueness of equilibrium states for some spin and continuum systems

M. Cassandro, G. Gallavotti, J. L. Lebowitz, J. L. Monroe

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The one to one correspondence between the existence of a unique equilibrium state and the differentiability of the free energy density with respect to the external field previously shown for Ising ferromagnetis is extendend to higher valued spin systems as well as to continuum systems satisfying the Fortuin, Kasteleyn and Ginibre inequalities. In particular this is shown to hold for a mixture of A -B particles in which there is no interaction between like particles and a repulsion between unlike particles. Where the derivative of the free energy is discontinuous there are at least two equilibrium states.

Original languageEnglish (US)
Pages (from-to)153-165
Number of pages13
JournalCommunications In Mathematical Physics
Volume32
Issue number2
DOIs
StatePublished - Jun 1973
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Mathematical Physics

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