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arXiv · 1812.04398

On the Patterson-Sullivan measure for geodesic flows on rank $1$ manifolds without focal points

Fei Liu·Fang Wang·Weisheng Wu
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Abstract

In this article, we consider the geodesic flow on a compact rank $1$ Riemannian manifold $M$ without focal points, whose universal cover is denoted by $X$. On the ideal boundary $X(\infty)$ of $X$, we show the existence and uniqueness of the Busemann density, which is realized via the Patterson-Sullivan measure. Based on the the Patterson-Sullivan measure, we show that the geodesic flow on $M$ has a unique invariant measure of maximal entropy. We also obtain the asymptotic growth rate of the volume of geodesic spheres in $X$ and the growth rate of the number of closed geodesics on $M$. These results generalize the work of Margulis and Knieper in the case of negative and nonpositive curvature respectively.

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Fei Liu, Fang Wang, Weisheng Wu. 2018-12-11. On the Patterson-Sullivan measure for geodesic flows on rank $1$ manifolds without focal points. https://arxiv.org/abs/1812.04398

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