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- W2400909225 abstract "We study a stochastic version of the Greenberg-Hastings cellular automa- ton, a simple model of wave propagation in reaction-diffusion media. Despite its apparent simplicity, its global dynamics displays various com- plex behaviours. Here, we investigate the influence of temporary or definitive failures of the cells of the grid. We show that a continuous decrease of the probability of excitation of cells triggers a drastic change of behaviour, driving the system from an active to an extinct steady state. Simulations show that this phenomenon is a nonequilibrium phase transition that belongs to directed percolation universality class. Obser- vations show an amazing robustness of the critical behaviour with regard to topological perturbations: not only is the phase transition occurrence preserved, but its universality class remains directed percolation. We also demonstrate that the position of the critical threshold can be easily pre- dicted as it decreases linearly with the inverse of the average number of neighbours per cell." @default.
- W2400909225 created "2016-06-24" @default.
- W2400909225 creator A5002987164 @default.
- W2400909225 creator A5021999741 @default.
- W2400909225 date "2011-01-01" @default.
- W2400909225 modified "2023-10-17" @default.
- W2400909225 title "Robustness of the Critical Behaviour in the Stochastic Greenberg-Hastings Cellular Automaton Model" @default.
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