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Fluctuations and scaling in models for particle aggregation
Daniele Vilone, Claudio Castellano, Paolo Politi
We consider two sequential models of deposition and aggregation for particles. The first model (No Diffusion) simulates surface diffusion through a deterministic capture area, whil…
Breakdown of metastable step-flow growth on vicinal surfaces induced by nucleation
Daniele Vilone, Claudio Castellano, Paolo Politi
We consider the growth of a vicinal crystal surface in the presence of a step-edge barrier. For any value of the barrier strength, measured by the length l_es, nucleation of island…
Signature of effective mass in crackling noise asymmetry
Stefano Zapperi, Claudio Castellano, Francesca Colaiori +1
Crackling noise is a common feature in many dynamic systems [1-9], the most familiar instance of which is the sound made by a sheet of paper when crumpled into a ball. Although see…
Mean-field limit of systems with multiplicative noise
Miguel A. Munoz, Francesca Colaiori, Claudio castellano
A detailed study of the mean-field solution of Langevin equations with multiplicative noise is presented. Three different regimes depending on noise-intensity (weak, intermediate,…
Non mean-field behavior of the contact process on scale-free networks
Claudio Castellano, Romualdo Pastor-Satorras
We present an analysis of the classical contact process on scale-free networks. A mean-field study, both for finite and infinite network sizes, yields an absorbing-state phase tran…
Effect of network topology on the ordering dynamics of voter models
Claudio Castellano
We introduce and study the reverse voter model, a dynamics for spin variables similar to the well-known voter dynamics. The difference is in the way neighbors influence each other:…