Abstract
We investigate the asymptotic behavior of solutions to a kinetic equation describing the evolution of particles subject to the sum of a fixed, confining, Hamiltonian, and a small, time-oscillating, perturbation. The equation also involves an interaction operator which acts as a relaxation in the energy variable. This paper aims at providing a classical counterpart to the derivation of rate equations from the atomic Bloch equations. In the present classical setting, the homogenization procedure leads to a diffusion equation in the energy variable, rather than a rate equation, and the presence of the relaxation operator regularizes the limit process, leading to finite diffusion coefficients. The key assumption is that the time-oscillatory perturbation should have well-defined long time averages: our procedure includes general “ergodic” behaviors, amongst which periodic, or quasi-periodic potentials only are a particular case.
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Communicated by J.L. Lebowitz
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Castella, F., Degond, P. & Goudon, T. Large Time Dynamics of a Classical System Subject to a Fast Varying Force. Commun. Math. Phys. 276, 23–49 (2007). https://doi.org/10.1007/s00220-007-0339-7
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DOI: https://doi.org/10.1007/s00220-007-0339-7