Population dynamics in a random environment

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dc.creatorGiardina, Irene
dc.creatorBouchaud, Jean-Philippe
dc.creatorMezard, Marc
dc.date2000-05-11
dc.date2000-07-12
dc.date.accessioned2026-07-07T02:37:36Z
dc.date.available2026-07-07T02:37:36Z
dc.descriptionWe investigate the competition between barrier slowing down and proliferation induced superdiffusion in a model of population dynamics in a random force field. Numerical results in $d=1$ suggest that a new intermediate diffusion behaviour appears. We introduce the idea of proliferation assisted barrier crossing and give a Flory like argument to understand qualitatively this non trivial diffusive behaviour. A one loop RG analysis close to the critical dimension d_c=2 confirms that the random force fixed point is unstable and flows towards an uncontrolled strong coupling regime.
dc.description4 pages, 4 .eps figures. Submitted to Physical Review Letters Corrected sign in flow equation, one figure changed, abstract changed. S
dc.identifierhttps://arxiv.org/abs/cond-mat/0005187
dc.identifierhttp://arxiv.org/abs/cond-mat/0005187
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/16353
dc.subjectCondensed Matter
dc.titlePopulation dynamics in a random environment
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