Evolution of a population of random Boolean networks |
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Authors: | T. Mihaljev and B. Drossel |
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Affiliation: | 1.Institut für Festk?rperphysik,Darmstadt,Germany |
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Abstract: | We investigate the evolution of populations of random Boolean networks under selection for robustness of the dynamics with respect to the perturbation of the state of a node. The fitness landscape contains a huge plateau of maximum fitness that spans the entire network space. When selection is so strong that it dominates over drift, the evolutionary process is accompanied by a slow increase in the mean connectivity and a slow decrease in the mean fitness. Populations evolved with higher mutation rates show a higher robustness under mutations. This means that even though all the evolved populations exist close to the plateau of maximum fitness, they end up in different regions of network space. |
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Keywords: | KeywordHeading" >PACS 87.23.Kg Dynamics of evolution 89.75.Hc Networks and genealogical trees 87.15.A- Theory, modeling, and computer simulation |
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