Abstract
A method of adiabatic elimination is proposed based on the use of the Furutsu-Novikov formula. A case of two nonlinear Langevin equations and a spatially distributed problem typical for the nonlinear wave propagation in random media have been considered. The method not only permits adiabatic elimination of the fast-decaying variable from the equation for the slow-decaying one but also allows for the return effect of the slow-decaying subsystem on the fast-decaying one.
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Fedchenia, I.I. Adiabatic elimination based on functional differentiation in the nonlinear and spatially distributed cases. Z. Physik B - Condensed Matter 82, 441–451 (1991). https://doi.org/10.1007/BF01357193
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DOI: https://doi.org/10.1007/BF01357193