Authors: Schäffner, Mathias
Schweizer, Ben
Title: The time horizon for stochastic homogenization of the one-dimensional wave equation
Language (ISO): en
Abstract: The wave equation with stochastic coefficients can be classically homogenized on bounded time intervals; solutions converge in the homogenization limit to solutions of a wave equation with constant coefficients. This is no longer true on large time scales: Even in the periodic case with periodicity ε, classical homogenization fails for times of the order ε−2. We consider the one-dimensional wave equation and are interested in the critical time scale ε−β from where on classical homogenization fails. In the general setting, we derive upper and lower bounds for β in terms of the growth rate of correctors. In the specific setting of i.i.d. coefficients with matched impedance, we show that the critical time scale is ε−1
Subject Headings: wave
Issue Date: 2023-07
Appears in Collections:Preprints der Fakultät für Mathematik

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