Hitting time in regular sets and logarithm law for rapidly mixing dynamical systems

Details Hitting time in regular sets and logarithm law for rapidly mixing dynamical systems Hitting time in regular sets and logarithm law for rapidly mixing dynamical systems

2009-06-18

arxiv.org/abs/0906.3416v1

Mathematics

Dynamical Systems

Scientific paper

We prove that if a system has superpolynomial (faster than any power law) decay of correlations (with respect to Lipschitz observables) then the time $\tau (x,S_{r})$ needed for a typical point $x$ to enter for the first time a set $S_{r}=\{x:f(x)\leq r\}$ which is a sublevel of a Lipschitz funcion $f$ scales as $\frac{1}{\mu (S_{r})}$ i.e. \begin{equation*} \underset{r\to 0}{\lim }\frac{\log \tau (x,S_{r})}{-\log r}=\underset{r\to 0}{\lim}\frac{\log \mu (S_{r})}{\log (r)}. \end{equation*} This generalizes a previous result obtained for balls. We will also consider relations with the return time distributions, an application to observed systems and to the geodesic flow of negatively curved manifolds.

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