Self-replication and splitting of domain patterns in reaction-diffusion systems with fast inhibitor

Details Self-replication and splitting of domain patterns in reaction-diffusion systems with fast inhibitor Self-replication and splitting of domain patterns in reaction-diffusion systems with fast inhibitor

1996-06-05

arxiv.org/abs/patt-sol/9605008v2

Phys. Rev. E 54, 3369 (1996).

Nonlinear Sciences

Pattern Formation and Solitons

9 pages (ReVTeX), 5 figures (postscript). To be published in Phys. Rev. E

Scientific paper

10.1103/PhysRevE.54.3369

An asymptotic equation of motion for the pattern interface in the domain-forming reaction-diffusion systems is derived. The free boundary problem is reduced to the universal equation of non-local contour dynamics in two dimensions in the parameter region where a pattern is not far from the points of the transverse instabilities of its walls. The contour dynamics is studied numerically for the reaction-diffusion system of the FitzHugh-Nagumo type. It is shown that in the asymptotic limit the transverse instability of the localized domains leads to their splitting and formation of the multidomain pattern rather than fingering and formation of the labyrinthine pattern.

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