Bifurcations of emerging patterns in the presence of additive noise

Gonzague Agez, Marcel G. Clerc, Eric Louvergneaux, René G. Rojas

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


A universal description of the effects of additive noise on super- and subcritical spatial bifurcations in one-dimensional systems is theoretically, numerically, and experimentally studied. The probability density of the critical spatial mode amplitude is derived. From this generalized Rayleigh distribution we predict the shape of noisy bifurcations by means of the most probable value of the critical mode amplitude. Comparisons with numerical simulations are in quite good agreement for cubic or quintic amplitude equations accounting for stochastic supercritical bifurcation and for cubic-quintic amplitude equation accounting for stochastic subcritical bifurcation. Experimental results obtained in a one-dimensional Kerr-like slice subjected to optical feedback confirm the analytical expression prediction for the supercritical bifurcation shape.

Original languageEnglish
Article number042919
JournalPhysical Review E
Issue number4
StatePublished - 23 Apr 2013


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