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Interaction of a Hopf bifurcation and a symmetry-breaking bifurcation: Stochastic potential and spatial correlations
Authors:A. Lemarchand  H. Lemarchand  E. Sulpice
Affiliation:(1) Laboratoire de Chimie Générale, Université Pierre et Marie Curie, F-75232 Paris, France
Abstract:The multivariate master equation for a general reaction-diffusion system is solved perturbatively in the stationary state, in a range of parameters in which a symmetry-breaking bifurcation and a Hopf bifurcation occur simultaneously. Thestochastic potential U is, in general, not analytic. However, in the vicinity of the bifurcation point and under precise conditions on the kinetic constants, it is possible to define a fourth-order expansion ofU around the bifurcating fixed point. Under these conditions, the domains of existence of different attractors, including spatiotemporal structures as well as the spatial correlations of the fluctuations around these attractors, are determined analytically. The role of fluctuations in the existence and stability of the various patterns is pointed out.
Keywords:Multivariate master equation  reaction-diffusion system  codimension-two bifurcation  nonanalytic potential  spatiotemporal structure  fluctuations  spatial correlations
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