Diffusion rate in non-generic directions in the wind-tree model
Dynamical Systems
2023-08-30 v1 Geometric Topology
Abstract
We show that any real number in [0,1) is a diffusion rate for the wind-tree model with rational parameters. We will also provide a criterion in order to describe the shape of the Lyapunov spectrum of cocycles obtained as suspension of a representation. As an application, we exhibit an infinite family of wind-tree billiards for which the interior of the Lyapunov spectrum is a big as possible: this is the full square (0,1)^2. To the best of the knowledge of the authors, these are the first complete descriptions where the interior of the Lyapunov spectrum is known explicitly in dimension two, even for general Fuchsian groups.
Cite
@article{arxiv.2308.15121,
title = {Diffusion rate in non-generic directions in the wind-tree model},
author = {Sylvain Crovisier and Pascal Hubert and Erwan Lanneau and Angel Pardo},
journal= {arXiv preprint arXiv:2308.15121},
year = {2023}
}
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26 pages