Asynchronism Induces Second Order Phase Transitions in Elementary Cellular Automata

Details Asynchronism Induces Second Order Phase Transitions in Elementary Cellular Automata Asynchronism Induces Second Order Phase Transitions in Elementary Cellular Automata

2007-03-23

arxiv.org/abs/nlin/0703044v2

Journal of Cellular Automata (2008)

Nonlinear Sciences

Cellular Automata and Lattice Gases

Scientific paper

Cellular automata are widely used to model natural or artificial systems. Classically they are run with perfect synchrony, i.e., the local rule is applied to each cell at each time step. A possible modification of the updating scheme consists in applying the rule with a fixed probability, called the synchrony rate. For some particular rules, varying the synchrony rate continuously produces a qualitative change in the behaviour of the cellular automaton. We investigate the nature of this change of behaviour using Monte-Carlo simulations. We show that this phenomenon is a second-order phase transition, which we characterise more specifically as belonging to the directed percolation or to the parity conservation universality classes studied in statistical physics.

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