A local limit theorem for densities of the additive component of a finite Markov Additive Process

Abstract: In this paper, we are concerned with centered Markov Additive Processes ${(X_t,Y_t)}{t\in\T}$ where the driving Markov process ${X_t}{t\in\T}$ has a finite state space. Under suitable conditions, we provide a local limit theorem for the density of the absolutely continuous part of the probability distribution of $t^{-1/2}Y_t$ given $X_0$. The rate of convergence and the moment condition are the expected ones with respect to the i.i.d case. An application to the joint distribution of local times of a finite jump process is sketched.