Evidence for directed percolation universality at the onset of spatiotemporal intermittency in coupled circle maps

Details Evidence for directed percolation universality at the onset of spatiotemporal intermittency in coupled circle maps Evidence for directed percolation universality at the onset of spatiotemporal intermittency in coupled circle maps

2002-10-16

arxiv.org/abs/nlin/0210034v1

Nonlinear Sciences

Chaotic Dynamics

Submitted to Physical Review E

Scientific paper

10.1103/PhysRevE.67.056218

We consider a lattice of coupled circle maps, a model arising naturally in descriptions of solid state phenomena such as Josephson junction arrays. We find that the onset of spatiotemporal intermittency (STI) in this system is analogous to directed percolation (DP), with the transition being to an unique absorbing state for low nonlinearities, and to weakly chaotic absorbing states for high nonlinearities. We find that the complete set of static exponents and spreading exponents at all critical points match those of DP very convincingly. Further, hyperscaling relations are fulfilled, leading to independent controls and consistency checks of the values of all the critical exponents. These results lend strong support to the conjecture that the onset of STI in deterministic models belongs to the DP universality class.

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