Equilibrium states in dynamical systems via geometric measure theory
Abstract
Given a dynamical system with a uniformly hyperbolic (`chaotic') attractor, the physically relevant Sinai-Ruelle-Bowen (SRB) measure can be obtained as the limit of the dynamical evolution of the leaf volume along local unstable manifolds. We extend this geometric construction to the substantially broader class of equilibrium states corresponding to H\"older continuous potentials; these states arise naturally in statistical physics and play a crucial role in studying stochastic behavior of dynamical systems. The key step in our construction is to replace leaf volume with a reference measure that is obtained from a Carath\'eodory dimension structure via an analogue of the construction of Hausdorff measure. In particular, we give a new proof of existence and uniqueness of equilibrium states that does not use standard techniques based on Markov partitions or the specification property; our approach can be applied to systems that do not have Markov partitions and do not satisfy the specification property.
Keywords
Cite
@article{arxiv.1803.10374,
title = {Equilibrium states in dynamical systems via geometric measure theory},
author = {Vaughn Climenhaga and Yakov Pesin and Agnieszka Zelerowicz},
journal= {arXiv preprint arXiv:1803.10374},
year = {2018}
}
Comments
42 pages, 10 figures. Replaced detailed proofs with outlines and proof sketches as this is a survey paper; detailed proofs now appear in the separate paper arXiv:1810.08663 by the same authors, which covers a broader class of systems