Selection of an attractor in a continuum of stable solutions: Descriptions of a wave front at different scales

摘要

Details of the particle dynamics are shown to modify the mean speed of a chemical wave front propagating into an unstable stationary state. The comparison of several description methods at different scales allows us to discriminate between different sources of departure from the macroscopic deterministic prediction and to give a quantitative expression of the speed corrections induced by discretization of the variables, internal fluctuations in small systems, and departure from local equilibrium in the presence of a fast reaction. [References: 40]