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Energy constrained sandpile models
Alessandro Chessa, Enzo Marinari, Alessandro Vespignani
We study two driven dynamical systems with conserved energy. The two automata contain the basic dynamical rules of the Bak, Tang and Wiesenfeld sandpile model. In addition a global…
Off-Equilibrium Dynamics of a 4D Spin Glass with Asymmetric Couplings
Enzo Marinari, Daniel A Stariolo
We study the off-equilibrium dynamics of the Edwards-Anderson spin glass in four dimensions under the influence of a non-hamiltonian perturbation. We find that for small asymmetry…
Violation of the Fluctuation Dissipation Theorem in Finite Dimensional Spin Glasses
Enzo Marinari, Giorgio Parisi, Federico Ricci-Tersenghi +1
We study the violation of the fluctuation-dissipation theorem in the three and four dimensional Gaussian Ising spin glasses using on and off equilibrium simulations. We have charac…
Numerical Simulations of Finite Dimensional Spin Glasses Show a Mean Field like Behavior
E. Marinari
I discuss results from numerical simulations of finite dimensional spin glass models, and show that they show all signatures of a mean field like behavior, basically coinciding wit…
Numerical Simulations of the Dynamical Behavior of the SK Model
Enzo Marinari, Giorgio Parisi, Davide Rossetti
We study the dynamical behavior of the Sherrington Kirkpatrick model. Thanks to the APE supercomputer we are able to analyze large lattice volumes, and to investigate the low r…
3D Spin Glass and 2D Ferromagnetic XY Model: a Comparison
David Iñiguez, Enzo Marinari, Giorgio Parisi +1
We compare the probability distributions and Binder cumulants of the overlap in the 3D Ising spin glass with those of the magnetization in the ferromagnetic 2D XY model. We analyze…