Internal Spatiotemporal Stochastic Resonance in a Microscopic Surface Reaction Model

Details Internal Spatiotemporal Stochastic Resonance in a Microscopic Surface Reaction Model Internal Spatiotemporal Stochastic Resonance in a Microscopic Surface Reaction Model

1999-06-15

arxiv.org/abs/cond-mat/9906215v1

Physics

Condensed Matter

5 pages, 3 figures

Scientific paper

We show the existence of internal stochastic resonance in a microscopic stochastic model for the oscillating CO oxidation on single crystal surfaces. This stochastic resonance arises directly from the elementary reaction steps of the system without any external input. The lattice gas model is investigated by means of Monte Carlo simulations. It shows oscillation phenomena and mesoscopic pattern formation. Stochastic resonance arises once homogeneous nucleation in the individual surface phases (reconstructed and non-reconstructed) is added. This nucleation is modelled as a noise process. As a result, synchronization of the kinetic oscillations is obtained. Internal stochastic resonance may thus be an internal regulation mechanism of extreme adaptability.

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