Breakdown of universality in transitions to spatio-temporal chaos
Tomas Bohr, Martin van Hecke, Rene' Mikkelsen, Mads Ipsen
Abstract
In this Letter 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 non-chaotic 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.
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