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4 papers · 2 filters
High-field limit of the Vlasov-Poisson-Fokker-Planck system: A comparison of different perturbation methods
L. L. Bonilla, J. Soler
A reduced drift-diffusion (Smoluchowski-Poisson) equation is found for the electric charge in the high-field limit of the Vlasov-Poisson-Fokker-Planck system, both in one and three…
Bulk dynamics for interfacial growth models
Cristobal Lopez, Pedro L. Garrido, Francisco de los Santos
We study the influence of the bulk dynamics of a growing cluster of particles on the properties of its interface. First, we define a {\it general bulk growth model} by means of a c…
Interface Scaling in the Contact Process
Ronald Dickman, Miguel A. Munoz
Scaling properties of an interface representation of the critical contact process are studied in dimensions 1 - 3. Simulations confirm the scaling relation beta_W = 1 - theta betwe…
Absorbing-state phase transitions in fixed-energy sandpiles
Alessandro Vespignani, Ronald Dickman, Miguel A. Munoz +1
We study sandpile models as closed systems, with conserved energy density playing the role of an external parameter. The critical energy density, , marks a nonequilibrium…