INVESTIGADORES
VAZQUEZ Federico
congresos y reuniones científicas
Título:
Presentacion mural: From microscopic to macroscopic dynamics in spin systems with two symmetric absorbing states
Autor/es:
FEDERICO VAZQUEZ
Lugar:
Huelva
Reunión:
Conferencia; FisEs 2009; 2009
Resumen:
We propose a general approach to study spin models with two symmetricabsorbing states. Starting from the microscopic dynamics on a squarelattice, we derive a Langevin equation for the time evolution of themagnetization field, that successfully explains coarsening propertiesof a wide range of nonlinear voter models and systems withintermediate states. We find that the macroscopic behavior onlydepends on the first derivatives of the spin-flip probabilities.Moreover, an analysis of the mean-field term reveals the three typesof transitions commonly observed in these systems -generalized voter,Ising and directed percolation-. Monte Carlo simulations of the spindynamics qualitatively agree with theoretical predictions.