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Mean-field approximation with coherent anomaly method for a non-equilibrium model

A L C Ferreira and S K Mendiratta

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A mean-field approximation for a 1D non-equilibrium lattice model, known as model A, is considered allowing the authors to compute the probability of a configuration of a given cluster of sites. The mean-field equations are numerically solved in the stationary regime for different cluster sizes L (<or=15). From a finite-size analysis and the application of the coherent anomaly method (CAM) they compute the critical parameter of the model, the correlation length critical exponent nu perpendicular to and the order parameter critical exponent beta ; the results are in agreement with those obtained by other methods.


PACS

05.50.+q Lattice theory and statistics (Ising, Potts, etc.)

64.60.F- Equilibrium properties near critical points, critical exponents

MSC

82C20 Dynamic lattice systems (kinetic Ising, etc.) and systems on graphs

82C26 Dynamic and nonequilibrium phase transitions (general)

82C27 Dynamic critical phenomena

82C80 Numerical methods (Monte Carlo, series resummation, etc.)

Subjects

Condensed matter: structural, mechanical & thermal

Statistical physics and nonlinear systems

Dates

Issue 4 (21 February 1993)



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