Presentacion mural: Group dynamics in the coevolution of states and networks

FEDERICO VAZQUEZ

Genova

Conferencia; Statphys 23; 2007

We study the coevolution of network structure and node states in an opiniondynamics model for the formation of communities in a population of individuals.In a single interaction a pair of connected nodes is chosen at random. Iftheir states are similar enough they interact, becoming even more similar; butif they are totally different, one of the individuals detaches its link fromits neighbor and attaches it to a randomly chosen node.The dynamics drives the system towards either an absorbing configurationcomposed by disconnected clusters whose agents share the same opinion or astationary active state with a fraction of links continuously being rewired.Within the absorbing phase, we found an anomalous order-disorder phasetransition that seems to disappear in the thermodynamic limit.We observe that the nature of this transition is closely related to thecrossover between the time scales that control the structure and the statedynamics of the system.