FEEDBACK-CONTROLLED DYNAMICS OF MEANDERING SPIRAL WAVES

The effect of a sequence of short Light impulses forcing a meandering spiral wave in the Belousov-Zhabotinsky reaction is investigated. Each stimulus is applied at a moment that corresponds to the passage of the wave front through a particular measuring point of the excitable medium. It is shown that the introduction of such a feedback results in two new dynamical regimes, named entrainment and resonance attractors. For both regimes the trajectory of the spiral wave tip has a symmetry center located at the measuring point. The experimental results are consistent with numerical simulations performed with the two-component Oregonator model.