Proving the ergodic hypothesis for billiards with disjoint cylindric scatterers

Nandor Simanyi
2003 Nonlinearity  
In this paper we study the ergodic properties of mathematical billiards describing the uniform motion of a point in a flat torus from which finitely many, pairwise disjoint, tubular neighborhoods of translated subtori (the so called cylindric scatterers) have been removed. We prove that every such system is ergodic (actually, a Bernoulli flow), unless a simple geometric obstacle for the ergodicity is present.
doi:10.1088/0951-7715/17/1/001 fatcat:bzwpj6mpareyrnru4vnzixhcnu