Physics – Biological Physics
Scientific paper
2002-07-25
Phys. Rev. E 69, 045102(R) (2004)
Physics
Biological Physics
10 pages, 4 figures (REVTeX4)
Scientific paper
10.1103/PhysRevE.69.045102
We study the phenomenon of spatiotemporal stochastic resonance (STSR) in a chain of diffusively coupled bistable oscillators. In particular, we examine the situation in which the \textit{global} STSR response is controlled by a \textit{locally applied signal} and reveal a wave front propagation. In order to deepen the understanding of the system dynamics, we introduce, on the time scale of STSR, the study of the effective statistical renormalization of a generic lattice system. Using this technique we provide a new criterion for STSR, and predict and observe numerically a bifurcation-like behaviour that reflects the difference between the most probable value of the local quasi-equilibrium density and its mean value. Our results, tested with a chain of nonlinear oscillators, appear to possess some universal qualities and may stimulate a deeper search for more generic phenomena
Chaplain M.
Levi V. V.
Samoletov Alex A.
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