Memory and self-induced shocks in an evolutionary population competing for limited resources

Details Memory and self-induced shocks in an evolutionary population competing for limited resources Memory and self-induced shocks in an evolutionary population competing for limited resources

2003-12-21

arxiv.org/abs/cond-mat/0312556v1

Physics

Condensed Matter

Statistical Mechanics

27 pages, 31 figures

Scientific paper

10.1103/PhysRevE.70.056101

We present a detailed discussion of the role played by memory, and the nature of self-induced shocks, in an evolutionary population competing for limited resources. Our study builds on a previously introduced multi-agent system [Phys. Rev. Lett 82, 3360 (1999)] which has attracted significant attention in the literature. This system exhibits self-segregation of the population based on the `gene' value p (where 0<=p<=1), transitions to `frozen' populations as a function of the global resource level, and self-induced large changes which spontaneously arise as the dynamical system evolves. We find that the large, macroscopic self-induced shocks which arise, are controlled by microscopic changes within extreme subgroups of the population (i.e. subgroups with `gene' values p~0 and p~1).

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