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 Chate-Manneville coupled map lattice model and in a soliton including variant of the stochastic Domany-Kinzel cellular automaton.
Bibliographical noteCopyright (2001) American Physical Society
- COUPLED MAP LATTICES
- RAYLEIGH-BENARD CONVECTION
- SPATIO-TEMPORAL INTERMITTENCY
- ABSORBING STATES
- DIRECTED PERCOLATION