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Spiral wave drift induced by stimulating wave trains.

Georg Gottwald1, Alain Pumir, Valentin Krinsky

  • 1INLN, 1361, Route des Lucioles, F-06560, Valbonne, France.

Chaos (Woodbury, N.Y.)
|June 5, 2003
PubMed
Summary

Periodic wave trains can induce spiral wave core drift, even with longer periods than the spiral wave itself. Meandering spiral properties are disrupted by these external wave stimulations.

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Area of Science:

  • Physics
  • Complex Systems
  • Nonlinear Dynamics

Background:

  • Spiral waves are fundamental patterns in excitable media.
  • Understanding spiral wave dynamics is crucial for various scientific fields.
  • External stimuli can significantly alter spiral wave behavior.

Purpose of the Study:

  • To investigate the drift of spiral wave cores in response to periodic wave train stimulation.
  • To explore the effect of wave train periods on spiral wave drift.
  • To examine the robustness of meandering spiral properties under periodic stimulation.

Main Methods:

  • Simulations of spiral wave dynamics in a homogeneous excitable medium.
  • Application of periodic wave trains near the spiral wave core.
  • Analysis of spiral wave core trajectory and meandering patterns.

Main Results:

  • Observed spiral wave core drift induced by wave trains with periods longer than the free spiral rotation period, contradicting existing theories.
  • Demonstrated that meandering spiral properties are not robust against periodic wave train stimulations.
  • Provided phenomenological arguments to explain the observed drift and loss of meandering.

Conclusions:

  • Periodic wave trains can induce novel forms of spiral wave drift.
  • Meandering behavior in spiral waves is susceptible to external periodic perturbations.
  • The findings offer new insights into the control and understanding of spiral wave dynamics in excitable media.

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