Emergence of Hierarchy on a Network of Complementary Agents

Details Emergence of Hierarchy on a Network of Complementary Agents Emergence of Hierarchy on a Network of Complementary Agents

2001-10-17

arxiv.org/abs/cond-mat/0110350v1

Int. J. Mod. Phys. C, 13, 783-797 (2002)

Physics

Condensed Matter

Disordered Systems and Neural Networks

13 pages, 4 figures, submitted

Scientific paper

10.1142/S0129183102003528

Complementarity is one of the main features underlying the interactions in biological and biochemical systems. Inspired by those systems we propose a model for the dynamical evolution of a system composed by agents that interact due to their complementary attributes rather than their similarities. Each agent is represented by a bit-string and has an activity associated to it; the coupling among complementary peers depends on their activity. The connectivity of the system changes in time respecting the constraint of complementarity. We observe the formation of a network of active agents whose stability depends on the rate at which activity diffuses in the system. The model exhibits a non-equilibrium phase transition between the ordered phase, where a stable network is generated, and a disordered phase characterized by the absence of correlation among the agents. The ordered phase exhibits multi-modal distributions of connectivity and activity, indicating a hierarchy of interaction among different populations characterized by different degrees of activity. This model may be used to study the hierarchy observed in social organizations as well as in business and other networks.

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