Markov chain approximations for nonsymmetric processes

Abstract

The aim of this article is to prove that diffusion processes in ${\mathbb{R}}^d$ with a drift can be approximated by suitable Markov chains on $n^{-1}{\mathbb{Z}}^d$. Moreover, we investigate sufficient conditions on the conductances which guarantee convergence of the associated Markov chains to such Markov processes. Analogous questions are answered for a large class of nonsymmetric jump processes. The proofs of our results rely on regularity estimates for weak solutions to the corresponding nonsymmetric parabolic equations and Dirichlet form techniques.