Dobrushin conditions and systematic scan

  • Authors:
  • Martin Dyer;Leslie ann Goldberg;Mark Jerrum

  • Affiliations:
  • School of computing, university of leeds, leeds ls2 9jt, uk;Department of computer science, university of liverpool, liverpool l69 3bx, uk;School of mathematical sciences, queen mary, university of london mile end road, london e1 4ns, uk

  • Venue:
  • Combinatorics, Probability and Computing
  • Year:
  • 2008

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Abstract

We consider Glauber dynamics on finite spin systems. The mixing time of Glauber dynamics can be bounded in terms of the influences of sites on each other. We consider three parameters bounding these influences: α, the total influence on a site, as studied by Dobrushin; α′, the total influence of a site, as studied by Dobrushin and Shlosman; and α″, the total influence of a site in any given context, which is related to the path-coupling method of Bubley and Dyer. It is known that if any of these parameters is less than 1 then random-update Glauber dynamics (in which a randomly chosen site is updated at each step) is rapidly mixing. It is also known that the Dobrushin condition α q-colourings of a degree-Δ graph G when q ≥ 2Δ.