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BERNARDO SPAGNOLO

Dynamics of a Lotka-Volterra system in the presence of non-Gaussian noise sources

  • Authors: La Cognata, A; Valenti, D; Dubkov, AA; Spagnolo, B
  • Publication year: 2009
  • Type: Altro
  • Key words: Random walks and Lévy flights; Fluctuation phenomena; Random processes; Noise
  • OA Link: http://hdl.handle.net/10447/50241

Abstract

We consider a Lotka-Volterra system of two competing species subject to multiplicative α-stable Lévy noise. The interaction parameter between the species is a random process which obeys a stochastic differential equation with a generalized bistable potential in the presence both of a periodic driving term and an additive alpha-stable Lévy noise. We study the species dynamics, which is characterized by two different dynamical regimes, exclusion of one species and coexistence of both ones, analyzing the role of the Lévy noise sources.