Influence of Lower-Order Terms on the Convergence Rates in Stochastic Homogenization of Elliptic Equations

Abstract: In this study, we investigate the convergence rates for the homogenization of elliptic equations with lower-order terms under the spectral gap assumption, in both bounded domains and the entire space. Our analysis demonstrates that lower-order terms significantly affect the convergence rate, particularly in the full space, where the rate changes from (O(\epsilon)) (observed without lower-order terms) to (O(\epsilon^{d/({d+2})})) due to their influence. In contrast, in bounded domains, the convergence rate remains (O(\epsilon^{1/2})), as boundary conditions exert a stronger influence than the lower-order terms. To manage the complexities introduced by lower-order terms, we developed a novel technique that localizes the analysis within small grids, enabling the application of the Poincar\'e inequality for effective estimates. This work builds upon existing frameworks, offering a refined approach to quantitative homogenization with lower-order terms.