STOCHASTIC RESONANCE IN SURFACE CATALYTIC-OXIDATION OF CARBON-MONOXIDE

Stochastic resonance is a nonlinear cooperative effect between externa l signal and noise, in which the noise can play a constructive role to increase the signal-to-noise ratio in the detection of a weak signal. A surface catalytic reaction model, to describe oxidization of carbon monoxide carrying out far from equilibrium, was adopted to study the stochastic resonance. By computer simulation, we found noise can induc e state-to-state transitions, and stochastic resonance behavior may ap pear at narrow bistable states or near discontinuous Hopf bifurcations , while a weak periodic signal riding on noise is input controlling. ( C) 1998 American Institute of Physics.