Sinai Billiards under Small External Forces II
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We study perturbations of Sinai billiards, where a small stationary force acts on the moving particle between its collisions with scatterers. In the previous work  we proved that the collision map preserved a unique Sinai–Ruelle–Bowen (SRB) measure that was Bernoulli and had exponential decay of correlations. Here we add several other statistical properties, including bounds on multiple correlations, the almost sure invariance principle (ASIP), the law of iterated logarithms, and a Kawasaki-type formula. We also show that the corresponding flow is Bernoulli and satisfies a central limit theorem.
KeywordsCentral Limit Theorem Open Loop Unstable Manifold Iterate Logarithm Stable Curve
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