Mathematics – Dynamical Systems
Scientific paper
2011-03-31
Mathematics
Dynamical Systems
Final version, to appear in Physica D (2011)
Scientific paper
10.1016/j.physd.2011.06.020
We construct classes of two-dimensional aperiodic Lorentz systems that have infinite horizon and are 'chaotic', in the sense that they are (Poincar\'e) recurrent, uniformly hyperbolic, ergodic, and the first-return map to any scatterer is $K$-mixing. In the case of the Lorentz tubes (i.e., Lorentz gases in a strip), we define general measured families of systems (\emph{ensembles}) for which the above properties occur with probability 1. In the case of the Lorentz gases in the plane, we define families, endowed with a natural metric, within which the set of all chaotic dynamical systems is uncountable and dense.
Lenci Marco
Troubetzkoy Serge
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