Two competing species in super-diffusive dynamical regimes

Bernardo Spagnolo, Davide Valenti, Dubkov, Angelo La Cognata

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The dynamics of two competing species within the framework of the generalized Lotka-Volterra equations, in the presence ofmultiplicative alpha-stable Lévy noise sources and a random time dependent interaction parameter, is studied. The species dynamics is characterized by two different dynamical regimes, exclusion of one species and coexistence of both, depending on the values of the interaction parameter, which obeys a Langevin equation with a periodically fluctuating bistable potential and an additive alpha-stable Lévy noise. The stochastic resonance phenomenon is analyzed for noise sources asymmetrically distributed. Finally, the effects of statistical dependence between multiplicative noise and additive noise on the dynamics of the two species are studied.
Original languageEnglish
Pages (from-to)273-279
Number of pages7
JournalTHE EUROPEAN PHYSICAL JOURNAL. B, CONDENSED MATTER PHYSICS
Volume77
Publication statusPublished - 2010

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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