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Dynamical effects induced by long range activation in a nonequilibrium reaction-diffusion system

M. Fuentes·M. N. Kuperman·J. Boissonade·E. Dulos·F. Gauffre·P. De Kepper
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Abstract

We both show experimentally and numerically that the time scales separation introduced by long range activation can induce oscillations and excitability in nonequilibrium reaction-diffusion systems that would otherwise only exhibit bistability. Namely, we show that the Chlorite-Tetrathionate reaction, where autocatalytic species diffuses faster than the substrates, the spatial bistability domain in the nonequilibrium phase diagram is extended with oscillatory and excitability domains. A simple model and a more realistic model qualitatively account for the observed behavior. The latter model provides quantitative agreement with the experiments.

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M. Fuentes, M. N. Kuperman, J. Boissonade, E. Dulos, F. Gauffre, P. De Kepper. 2002-07-18. Dynamical effects induced by long range activation in a nonequilibrium reaction-diffusion system. https://doi.org/10.1103/physreve.66.056205

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