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MiS Preprint

LSI for Kawasaki dynamics with weak interaction

Georg Menz


We consider a large lattice system of unbounded continuous spins that are governed by a Ginzburg-Landau type potential and a weak quadratic interaction. We derive the logarithmic Sobolev inequality (LSI) for Kawasaki dynamics uniform in the boundary data. The scaling of the LSI constant is optimal in the system size and our argument is independent of the geometric structure of the system. The proof consists of an application of the two-scale approach of Grunewald, Otto, Westdickenberg & Villani. Several ideas are needed to solve new technical difficulties due to the interaction. Let us mention the application of a new covariance estimate, a conditioning technique, and a generalization of the local Cramér theorem.

MSC Codes:
60K35, 60J25, 82B21
Logarithmic Sobolev inequality, Spin system, Kawasaki dynamics, Canonical ensemble, coarse-graining

Related publications

2011 Repository Open Access
Georg Menz

LSI for Kawasaki dynamics with weak interaction

In: Communications in mathematical physics, 307 (2011) 3, pp. 817-860