Poisson kernels of half–spaces in real hyperbolic spaces

Abstract

We provide an integral formula for the Poisson kernel of half-spaces for Brownian motion in real hyperbolic space ${\mathbb{H}}^n$. This enables us to find asymptotic properties of the kernel. We also show convergence to the Poisson kernel of the whole space ${\mathbb{H}}^n$. For $n=3$, $4$ or $6$ we compute explicit formulas for the Poisson kernel itself.