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Critical behavior of a dynamic analog to the q=3 Potts model

Elena Salazar-Neumann, María Cristina Vargas*, and Gabriel Pérez

  • Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Unidad Mérida Apartado Postal 73 “Cordemex,” 97310 Mérida, Yucatán, Mexico

  • *Electronic address: cristina@mda.cinvestav.mx

Phys. Rev. E 71, 036228 – Published 31 March, 2005

DOI: https://doi.org/10.1103/PhysRevE.71.036228

Abstract

We construct a dynamical analog to the q=3 Potts model, using linear chaotic maps and a diffusive coupling. We find well-defined order-disorder phase transitions (PTs) in the system, and obtain the phase diagrams for both simultaneous and sequential updating of the model. For simultaneous updating we find continuous PTs whose critical exponents are consistent with those of the equilibrium Potts model. Under sequential updating, the phase diagram shows a tricritical point, and the PTs become first order for large coupling and chaoticity of the local maps. A preliminary estimation finds critical exponents in the region of continuous PTs that are not consistent with those of the equilibrium model.

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