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arXiv · 1410.3805

On the convergence to equilibrium of unbounded observables under a family of intermittent interval maps

Johannes Kautzsch·Marc Kesseböhmer·Tony Samuel
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Abstract

We consider a family $\{ T_{r} \colon [0, 1] \circlearrowleft \}_{r \in [0, 1]}$ of Markov interval maps interpolating between the Tent map $T_{0}$ and the Farey map $T_{1}$. Letting $\mathcal{P}_{r}$ denote the Perron-Frobenius operator of $T_{r}$, we show, for $\beta \in [0, 1]$ and $\alpha \in (0, 1)$, that the asymptotic behaviour of the iterates of $\mathcal{P}_{r}$ applied to observables with a singularity at $\beta$ of order $\alpha$ is dependent on the structure of the $\omega$-limit set of $\beta$ with respect to $T_{r}$. Having a singularity it seems that such observables do not fall into any of the function classes on which convergence to equilibrium has been previously shown.

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Johannes Kautzsch, Marc Kesseböhmer, Tony Samuel. 2014-10-14. On the convergence to equilibrium of unbounded observables under a family of intermittent interval maps. https://doi.org/10.1007/s00023-015-0451-8

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