Equivalence of a mixing condition and the LSI in spin systems with infinite range interaction

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3 Scopus citations

Abstract

We investigate unbounded continuous spin-systems with infinite-range interactions. We develop a new technique for deducing decay of correlations from a uniform Poincaré inequality based on a directional Poincaré inequality, which we derive through an averaging procedure. We show that this decay of correlations is equivalent to the Dobrushin–Shlosman mixing condition. With this, we also state and provide a partial answer to a conjecture regarding the relationship between the relaxation rates of non-ferromagnetic and ferromagnetic systems. Finally, we show that for a symmetric, ferromagnetic system with zero boundary conditions, a weaker decay of correlations can be bootstrapped.

Original languageEnglish (US)
Pages (from-to)2877-2912
Number of pages36
JournalStochastic Processes and their Applications
Volume126
Issue number10
DOIs
StatePublished - Oct 1 2016
Externally publishedYes

Keywords

  • Decay of correlations
  • Gibbs measure
  • Log-Sobolev inequality
  • Long-range interactions
  • Phase transition
  • Poincaré inequality
  • Spin systems

ASJC Scopus subject areas

  • Statistics and Probability
  • Modeling and Simulation
  • Applied Mathematics

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