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Nonequilibrium phase transition in a model for the propagation of innovations among economic agents
Llas, Mateu; Gleiser, Pablo M.; López, Juan M.; Díaz Guilera, Albert
Universitat de Barcelona
We characterize the different morphological phases that occur in a simple one-dimensional model of propagation of innovations among economic agents [X. Guardiola et al., Phys. Rev E 66, 026121 (2002)]. We show that the model can be regarded as a nonequilibrium surface growth model. This allows us to demonstrate the presence of a continuous roughening transition between a flat (system size independent fluctuations) and a rough phase (system size dependent fluctuations). Finite-size scaling studies at the transition strongly suggest that the dynamic critical transition does not belong to directed percolation and, in fact, critical exponents do not seem to fit in any of the known universality classes of nonequilibrium phase transitions. Finally, we present an explanation for the occurrence of the roughening transition and argue that avalanche driven dynamics is responsible for the novel critical behavior.
2011-07-26
Física
Sistemes no lineals
Superfícies (Física)
Interfícies (Ciències físiques)
Pel·lícules fines
Physics
Nonlinear systems
Surfaces (Physics)
Interfaces (Physical sciences)
Thin films
(c) American Physical Society, 2003
Article
The American Physical Society
         

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