Authors Referees APS Members |
January 2008, to be published in Physical Review E
Wavy fronts and speed bifurcation in excitable systems with cross diffusion
A bifurcation of excitation fronts induced by cross diffusion in two-component bistable reaction-diffusion systems of activator-inhibitor type is discovered. This bifurcation is similar to the nonequilibrium Ising-Bloch bifurcation. A new type of fronts, whose spatial profiles are characterized by oscillating tails, are associated with this bifurcation. These fronts are described using exact analytical solutions of piecewise linear reaction-diffusion equations. © 2008 The American Physical Society.
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