Dresden 2009 – scientific programme
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AGSOE: Arbeitsgruppe Physik sozio-ökonomischer Systeme
AGSOE 14: Poster Session
AGSOE 14.8: Poster
Wednesday, March 25, 2009, 18:10–20:00, P1B
Spontaneous ordering against external mass media in social systems — •Juan Carlos Gonzalez-Avella1, Mario G. Cosenza2, Victor M. Eguiluz1, and Maxi San Miguel1 — 1IFISC (CSIC-UIB), Instituto de Física Interdisciplinar y Sistemas Complejos, Campus Universitat Illes Balears, E-07122 Palma de Mallorca, Spain. — 2Centro de Física Fundamental, Universidad de Los Andes, Mérida, Mérida 5251, Venezuela.
We study the collective behavior of nonequilibrium systems subject to an external field modeled as mass media or propaganda with a dynamics characterized by the existence of non-interacting states. Aiming at exploring the generality of the results, we consider two types of models according to the nature of their state variables: (i) a vector model, where interactions are proportional to the overlap between the states, and (ii) a scalar model, where interaction depends on the distance between states. In both cases the system displays three phases: two ordered phases, one parallel to the field, and another orthogonal to the field; and a disordered phase. The phase space is numerically characterized for each model in a fully connected network. By placing the particles on a small-world network, we show that, while a regular lattice favors the alignment with the field, the presence of long-range interactions promotes the formation of the ordered phase orthogonal to the field.