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7 papers · 2 filters
Dynamical phases and hysteresis in a simple one-lane traffic model
M. Antoni, R. Cafiero
A two parameter model for single lane car-following is introduced and its equilibrium and non-equilibrium properties are studied. Despite its simplicity, this model exhibits a rich…
A simple system with two temperatures
Raphael Exartier, Luca Peliti
We study the stationary nonequilibrium regime which settles in when two single-spin paramagnets each in contact with its own thermal bath are coupled. The response vs. correlation…
Criticality of the "critical state" of granular media: Dilatancy angle in the tetris model
M. Piccioni, V. Loreto, S. Roux
The dilatancy angle describes the propensity of a granular medium to dilate under an applied shear. Using a simple spin model (the ``tetris'' model) which accounts for geometrical…
Entropy for relaxation dynamics in granular media
E. Caglioti, V. Loreto
We investigate the role of entropic concepts for the relaxation dynamics in granular systems. In these systems the existence of a geometrical frustration induces a drastic modifica…
Fractal Growth with Quenched Disorder
L. Pietronero, R. Cafiero, A. Gabrielli
In this lecture we present an overview of the physics of irreversible fractal growth process, with particular emphasis on a class of models characterized by {\em quenched disorder}…
Damage-Spreading in Self-Organized Critical Systems
Raffaele Cafiero, Angelo Valleriani, Josè Luis Vega
We study the behavior under perturbations of different versions of Bak-Sneppen (BS) model in 1 + 1 dimension. We focus our attention on the damage-spreading features of the BS mode…