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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Noise-guided evolution within cyclical interactions

Matjaž Perc1,3 and Attila Szolnoki2

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We study a stochastic predator–prey model on a square lattice, where each of the six species has two superior and two inferior partners. The invasion probabilities between species depend on the predator–prey pair and are supplemented by Gaussian noise. Conditions are identified that warrant the largest impact of noise on the evolutionary process, and the results of Monte Carlo simulations are qualitatively reproduced by a four-point cluster dynamical mean-field approximation. The observed noise-guided evolution is deeply routed in short-range spatial correlations, which is supported by simulations on other host lattice topologies. Our findings are conceptually related to the coherence resonance phenomenon in dynamical systems via the mechanism of threshold duality. We also show that the introduced concept of noise-guided evolution via the exploitation of threshold duality is not limited to predator–prey cyclical interactions, but may apply to models of evolutionary game theory as well, thus indicating its applicability in several different fields of research.


PACS

02.50.Le Decision theory and game theory

05.40.Ca Noise

02.50.Ng Distribution theory and Monte Carlo studies

02.50.Ey Stochastic processes

Subjects

Computational physics

Statistical physics and nonlinear systems

Dates

Issue 8 (August 2007)

Received 31 May 2007

Published 15 August 2007



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