Frequency dependence of phase-synchronization time in nonlinear dynamical systems

Kwangho Park, Ying-Cheng Lai, Satish Krishnamoorthy

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

It has been found recently that the averaged phase-synchronization time between the input and the output signals of a nonlinear dynamical system can exhibit an extremely high sensitivity to variations in the noise level. In real-world signal-processing applications, sensitivity to frequency variations may be of considerable interest. Here we investigate the dependence of the averaged phase-synchronization time on frequency of the input signal. Our finding is that, for typical nonlinear oscillator systems, there can be a frequency regime where the time exhibits significant sensitivity to frequency variations. We obtain an analytic formula to quantify the frequency dependence, provide numerical support, and present experimental evidence from a simple nonlinear circuit system. (c) 2007 American Institute of Physics.

Original languageEnglish
Article number043111
Number of pages5
JournalChaos
Volume17
Issue number4
Early online date15 Nov 2007
DOIs
Publication statusPublished - Dec 2007

Keywords

  • stochastic resonance
  • chaotic oscillators
  • noise
  • mechanoreceptors
  • enhancement
  • coherence
  • crayfish
  • locking

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