Front instabilities in a forced oscillatory medium with global coupling.
We study a two-dimensional, locally and globally coupled oscillatory system that is subjected to external forcing at a frequency equal to twice its natural frequency. It is shown that the onset of an Ising-Bloch transition is preceded by novel front instabilities: a pattern formation instability, wave trains along the front, and a weak turbulence in the frontal patterns.
Battogtokh
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Center for Computational Physics, Department of Physics and Astronomy, The University of Georgia, Athens 30602, USA.