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Noise-Induced Stabilization in Population Dynamics

2011; American Physical Society; Volume: 107; Issue: 18 Linguagem: Inglês

10.1103/physrevlett.107.180603

1092-0145

Matthew W. Parker, Alex Kamenev, Baruch Meerson,

stochastic dynamics and bifurcation

We investigate a model in which strong noise in a subpopulation creates a metastable state in an otherwise unstable two-population system. The induced metastable state is vortexlike, and its persistence time grows exponentially with the noise strength. A variety of distinct scaling relations are observed depending on the relative strength of the subpopulation noises.