Oscillations of many interfaces in the near-shadow regime of two-component reaction-diffusion systems

Shuangquan Xie, Theodore Kolokolnikov

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1 Citation (Scopus)


We consider the general class of two-component reaction-diffusion systems on a finite domain that admit interface solutions in one of the components, and we study the dynamics of n interfaces in one dimension. In the limit where the second component has large diffusion, we fully characterize the possible behaviour of n interfaces. We show that after the transients die out, the motion of n interfaces is described by the motion of a single interface on the domain that is 1/n the size of the original domain. Depending on parameter regime and initial conditions, one of the following three outcomes results: (1) some interfaces collide; (2) all n interfaces reach a symmetric steady state; (3) all n interfaces oscillate indefinitely. In the latter case, the oscillations are described by a simple harmonic motion with even-numbered interfaces oscillating in phase while odd-numbered interfaces are oscillating in anti-phase. This extends a recent work by [McKay, Kolokolnikov, Muir, DCDS B(17), 2012] from two to any number of interfaces.

Original languageEnglish
Pages (from-to)959-975
Number of pages17
JournalDiscrete and Continuous Dynamical Systems - Series B
Issue number3
Publication statusPublished - 2016 May
Externally publishedYes


  • Interface oscillation
  • Pattern formation
  • Reaction-diffusion systems

ASJC Scopus subject areas

  • Discrete Mathematics and Combinatorics
  • Applied Mathematics


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