Invariant Measures and Decay of Correlations for a Class of Ergodic Probabilistic Cellular Automata

Details Invariant Measures and Decay of Correlations for a Class of Ergodic Probabilistic Cellular Automata Invariant Measures and Decay of Correlations for a Class of Ergodic Probabilistic Cellular Automata

2009-07-28

arxiv.org/abs/0907.4841v2

Mathematics

Dynamical Systems

Scientific paper

We give new sufficient ergodicity conditions for two-state probabilistic cellular automata (PCA) of any dimension and any radius. The proof of this result is based on an extended version of the duality concept. Under these assumptions, in the one dimensional case, we study some properties of the unique invariant measure and show that it is shift-mixing. Also, the decay of correlation is studied in detail. In this sense, the extended concept of duality gives exponential decay of correlation and allows to compute explicitily all the constants involved.

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