Nongaussian fluctuations arising from finite populations: Exact results for the evolutionary Moran process

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dc.creatorClaussen, Jens Christian
dc.creatorTraulsen, Arne
dc.date2004-09-24
dc.date2006-02-09
dc.date.accessioned2026-07-07T06:37:17Z
dc.date.available2026-07-07T06:37:17Z
dc.descriptionThe appropriate description of fluctuations within the framework of evolutionary game theory is a fundamental unsolved problem in the case of finite populations. The Moran process recently introduced into this context [Nowak et al., Nature (London) 428, 646 (2004)] defines a promising standard model of evolutionary game theory in finite populations for which analytical results are accessible. In this paper, we derive the stationary distribution of the Moran process population dynamics for arbitrary $2\times{}2$ games for the finite size case. We show that a nonvanishing background fitness can be transformed to the vanishing case by rescaling the payoff matrix. In contrast to the common approach to mimic finite-size fluctuations by Gaussian distributed noise, the finite size fluctuations can deviate significantly from a Gaussian distribution.
dc.description4 pages (2 figs). Published in Physical Review E (Rapid Communications)
dc.identifierhttps://arxiv.org/abs/cond-mat/0409656
dc.identifierhttp://arxiv.org/abs/cond-mat/0409656
dc.identifierPhys. Rev. E 71, 025101(R) (2005)
dc.identifierdoi:10.1103/PhysRevE.71.025101
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/100339
dc.subjectStatistical Mechanics
dc.subjectOther Condensed Matter
dc.titleNongaussian fluctuations arising from finite populations: Exact results for the evolutionary Moran process
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