Coalescing Cellular Automata -- Synchronizing CA by Common Random Source and Varying Asynchronicity

Details Coalescing Cellular Automata -- Synchronizing CA by Common Random Source and Varying Asynchronicity Coalescing Cellular Automata -- Synchronizing CA by Common Random Source and Varying Asynchronicity

2007-12-12

arxiv.org/abs/0712.1992v1

Nonlinear Sciences

Cellular Automata and Lattice Gases

Scientific paper

We say that a Cellular Automata (CA) is coalescing when its execution on two distinct (random) initial configurations in the same asynchronous mode (the same cells are updated in each configuration at each time step) makes both configurations become identical after a reasonable time. We prove coalescence for two elementary rules, non coalescence for two other, and show that there exists infinitely many coalescing CA. We then conduct an experimental study on all elementary CA and show that some rules exhibit a phase transition, which belongs to the universality class of directed percolation.

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