Absorbing-state phase transitions in fixed-energy sandpiles

摘要: We study sandpile models as closed systems, with the conserved energy density zeta playing role of an external parameter. The critical zeta(c) marks a nonequilibrium phase transition between active and absorbing states. Several fixed-energy sandpiles are studied in extensive simulations stationary transient properties, well dynamics roughening interface-height representation. Our primary goal is to identify universality classes such models, hopes assessing validity two recently proposed approaches sandpiles: phenomenological continuum Langevin description states, mapping driven interface random media.