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Breakdown of Universality in Transitions to Spatiotemporal Chaos

2001; American Physical Society; Volume: 86; Issue: 24 Linguagem: Inglês

10.1103/physrevlett.86.5482

1092-0145

Tomas Bohr, Martin van Hecke, René Mikkelsen, Mads Ipsen,

Stochastic processes and statistical mechanics

We show that the transition from laminar to active behavior in extended chaotic systems can vary from a continuous transition in the universality class of directed percolation with infinitely many absorbing states to what appears as a first-order transition. The latter occurs when finite lifetime nonchaotic structures, called "solitons," dominate the dynamics. We illustrate this scenario in an extension of the deterministic Chaté-Manneville coupled map lattice model and in a soliton including variant of the stochastic Domany-Kinzel cellular automaton.