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Related Experiment Videos

Resonant patterns in noisy active media.

Changsong Zhou1, Jürgen Kurths

  • 1Institute of Physics, University of Potsdam, PF 601553, 14415 Potsdam, Germany.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|July 13, 2004
PubMed
Summary
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Weak signals can control noise-induced patterns in active media. Researchers observed frequency-locked resonant patterns and manipulated oscillation frequencies, offering new experimental tools.

Area of Science:

  • Physics
  • Nonlinear Dynamics
  • Complex Systems

Background:

  • Active media exhibit complex behaviors, including wave propagation and oscillations.
  • Noise significantly influences the dynamics of these systems.
  • Understanding resonant responses is crucial for controlling active media.

Purpose of the Study:

  • To investigate the role of noise in controlling resonant responses of active media.
  • To explore how weak periodic forcing reorganizes noise-induced patterns.
  • To analyze the impact of noise on frequency locking and Arnold tongues.

Main Methods:

  • Analysis of active media in both excitable and oscillatory regimes.
  • Investigating the effects of weak periodic forcing and noise.

Related Experiment Videos

  • Observing frequency-locked resonant patterns and Arnold tongues.

    • Main Results:

    • Noise-induced irregular waves in excitable media can form frequency-locked resonant patterns.
    • Resonance occurs when signal frequency matches the noise-induced timescale.
    • Noise controls oscillation frequency and reshapes Arnold tongues in oscillatory media.

    Conclusions:

    • A combination of noise and weak signals can effectively manipulate active extended systems.
    • Observed phenomena offer potential for experimental control of complex media dynamics.
    • The study provides insights into noise-mediated resonance and pattern formation.