Coherence resonance in coupled chaotic oscillators

Zonghua Liu, Ying-Cheng Lai

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)


Existing works on coherence resonance, i.e., the phenomenon of noise-enhanced temporal regularity, focus on excitable dynamical systems such as those described by the FitzHugh-Nagumo equations. We extend the scope of coherence resonance to an important class of dynamical systems: coupled chaotic oscillators. In particular, we show that, when a system of coupled chaotic oscillators is under the influence of noise, the degree of temporal regularity of dynamical variables characterizing the difference among the oscillators can increase and reach a maximum value at some optimal noise level. We present numerical results illustrating the phenomenon and give a physical theory to explain it.

Original languageEnglish
Pages (from-to)4737-4740
Number of pages4
JournalPhysical Review Letters
Issue number21
Publication statusPublished - 21 May 2001


  • on-off intermittency
  • stochastic resonance
  • excitable systems
  • phase synchronization
  • persistent currents
  • blowout bifurcation
  • noise
  • basins
  • rings


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