Communications in Mathematical Physics

, Volume 81, Issue 1, pp 127–147 | Cite as

Nonequilibrium measures which exhibit a temperature gradient: Study of a model

  • A. Galves
  • C. Kipnis
  • C. Marchioro
  • E. Presutti


We give some rules to define measures which could describe heat flow in homogeneous crystals. We then study a particular model which is explicitly solvable: the one dimensional nearest neighborhood Ising model. We analyze two cases. In the first one the spins at the two boundaries interact with reservoirs at different temperatures; in the thermodynamical limit the measure we introduce converges locally to Gibbs measures and a temperature profile is so derived. We obtain an explicit expression for the thermal conductivity coefficient which depends on the temperature. In the second case we study the asymptotic behavior starting from an initial state in which each half of the space is at a different temperature. We find again a temperature profile which asymptotically obeys the heat equation with the thermal conductivity coefficient previously derived. From a mathematical point of view, the analysis of the invariant measure is made possible by studying a “time-reversed” process related to a graphical representation of an associated process. This provides us with an explicit formula for then-fold correlation function and we study the limiting behavior using both this representation (for proving an exchangeability result) and a Donsker-type, spacetime renormalization procedure.


Thermal Conductivity Correlation Function Asymptotic Behavior Heat Flow Temperature Profile 
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Copyright information

© Springer-Verlag 1981

Authors and Affiliations

  • A. Galves
    • 1
  • C. Kipnis
    • 2
  • C. Marchioro
    • 3
  • E. Presutti
    • 4
  1. 1.Instituto de Matématica e EstatisticaUniversidade de São PauloSão PauloBrazil
  2. 2.Centre de Mathématiques de l'Ecole Polytechnique, Plateau de PalaiseauPalaiseau CedexFrance
  3. 3.Dipartimento di MatematicaLibera Università di TrentoPovo (Trento)Italy
  4. 4.Istituto MatematicoUniversità di RomaRomaItaly

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