Stochastic homogenization of a class of quasiconvex viscous Hamilton-Jacobi equations in one space dimension

Abstract

We prove homogenization for a class of viscous Hamilton-Jacobi equations in the stationary and ergodic setting in one space dimension. Our assumptions include most notably the following: the Hamiltonian is of the form $G(p)+\beta V(x,\omega )$, the function $G$ is coercive and strictly quasiconvex, $\min G=0$, $\beta >0$, the random potential $V$ takes values in $[0,1]$ with full support and it satisfies a hill condition that involves the diffusion coefficient. Our approach is based on showing that, for every direction outside of a bounded interval $({\theta }_1(\beta ),{\theta }_2(\beta ))$, there is a unique sublinear corrector with certain properties. We obtain a formula for the effective Hamiltonian and deduce that it is coercive, identically equal to $\beta$ on $({\theta }_1(\beta ),{\theta }_2(\beta ))$, and strictly monotone elsewhere.

arXiv comment21 pages, 1 figure