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Birth, death and diffusion of interacting particles

Emilio Hernández-García and Cristóbal López

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Individual-entity-based models of chemical or biological dynamics usually consider individual entities diffusing in space and performing a birth–death-type dynamics. In this work we study the properties of a model in this class where the birth dynamics is mediated by the local, within a given distance, density of particles. Groups of individuals are formed in the system and in this paper we concentrate on the study of the properties of these clusters (lifetime, size, and collective diffusion). In particular, in the limit of the interaction distance approaching the system size, a unique cluster appears which helps us to understand and characterize the clustering dynamics of the model.


PACS

87.23.Cc Population dynamics and ecological pattern formation

Subjects

Environmental and Earth science

Dates

Issue 49 (14 December 2005)

Received 8 July 2005

Published 25 November 2005



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