Journal of Statistical Physics

, Volume 101, Issue 1–2, pp 473–481 | Cite as

Excitable Structures in Stochastic Bistable Media

  • J. García-Ojalvo
  • L. Schimansky-Geier


We examine the influence of parametric noise on the spatiotemporal behavior of a bistable medium with activator–inhibitor dynamics. Deterministic front propagation in one dimension is seen to be destabilized by the external noise, resulting in the propagation of solitary pulses through the system. For large enough noise levels, this state becomes unstable via a backfiring mechanism, which eventually leads to a turbulent state.

reaction diffusion system noise-induced phenomena activator–inhibitor dynamics pulse propagation 


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Copyright information

© Plenum Publishing Corporation 2000

Authors and Affiliations

  • J. García-Ojalvo
    • 1
    • 2
  • L. Schimansky-Geier
    • 1
  1. 1.Institut für PhysikHumboldt-Universität zu BerlinBerlinGermany
  2. 2.Departament de Física i Enginyeria NuclearUniversitat Politècnica de CatalunyaTerrassaSpain

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