Majority versus minority dynamics: Phase transition in an interacting two-state spin system

Details Majority versus minority dynamics: Phase transition in an interacting two-state spin system Majority versus minority dynamics: Phase transition in an interacting two-state spin system

2003-06-03

arxiv.org/abs/cond-mat/0306061v2

Phys. Rev. E 68, 046106 (2003)

Physics

Condensed Matter

Statistical Mechanics

11 pages, 3 figures, revtex4 2-column format; minor revisions for publication in PRE

Scientific paper

10.1103/PhysRevE.68.046106

We introduce a simple model of opinion dynamics in which binary-state agents evolve due to the influence of agents in a local neighborhood. In a single update step, a fixed-size group is defined and all agents in the group adopt the state of the local majority with probability p or that of the local minority with probability 1-p. For group size G=3, there is a phase transition at p_c=2/3 in all spatial dimensions. For p>p_c, the global majority quickly predominates, while for p

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