We study the limiting probability distribution of the homogenization error for second
order elliptic equations in divergence form with highly oscillatory periodic
conductivity coefficients and highly oscillatory stochastic potential. The
effective conductivity coefficients are the same as those of the standard periodic
homogenization, and the effective potential is given by the mean. We show that the
limiting distribution of the random part of the homogenization error, as random
elements in proper Hilbert spaces, is Gaussian and can be characterized
by the homogenized Green’s function, the homogenized solution and the
statistics of the random potential. This generalizes previous results in the
setting with slowly varying diffusion coefficients, and the current setting
with fast oscillations in the differential operator requires new methods to
prove compactness of the probability distributions of the random fluctuation.
Keywords
periodic and stochastic homogenization, random field,
probability measures on Hilbert space, weak convergence of
probability distributions