52 citations · 183 across the 13 of their papers we have counts for
11 papers · 1 filter
Macroscopic Fokker-Planck equation from microscopic Glauber dynamics for the Nagle-Kardar model
Jean-François de Kemmeter, Stefano Ruffo, Stefano Gherardini
In the companion Letter we have highlighted the dynamical universality class of the Nagle-Kardar model, where a mean-field interaction is added to the one-dimensional nearest-neigh…
Random initial data and average shock time in the Fermi-Pasta-Ulam-Tsingou chain
Matteo Gallone, Ricardo Grande, Antonio Ponno +2
We investigate the dynamics of the Fermi--Pasta--Ulam--Tsingou chain with long-wavelength random initial data. When the energy per particle is small, thermal equilibrium is not rea…
Dynamical universality class for competing short- and long-range interactions
Jean-François de Kemmeter, Stefano Ruffo, Stefano Gherardini
Understanding the dynamical universality classes of systems with long-range interactions remains a key challenge in statistical physics. In this Letter, we analytically and numeric…
Ensemble Inequivalence in Long-Range Quantum Spin Systems
Daniel Arrufat-Vicente, David Mukamel, Stefano Ruffo +1
Ensemble inequivalence occurs when a systems thermodynamic properties vary depending on the statistical ensemble used to describe it. This phenomenon is known to happen in systems…
Thermal transport in long-range interacting harmonic chains perturbed by long-range conservative noise
Francesco Andreucci, Stefano Lepri, Carlos Mejía-Monasterio +1
We study non-equilibrium properties of a chain of oscillators with both long-ranged harmonic interactions and long-range conservative noise that exchange momenta of particle pa…
Energy cascade and Burgers turbulence in the Fermi-Pasta-Ulam-Tsingou chain
Matteo Gallone, Antonio Ponno, Stefano Ruffo
The dynamics of initial long-wavelength excitations of the Fermi-Pasta-Ulam-Tsingou chain has been the subject of intense investigations since the pioneering work of Fermi and coll…
Non-Gaussian Fluctuations in Biased Resistor Networks: Size Effects versus Universal Behavior
C. Pennetta, E. Alfinito, L. Reggiani +1
We study the distribution of the resistance fluctuations of biased resistor networks in nonequilibrium steady states. The stationary conditions arise from the competition between t…
The Non--Ergodicity Threshold: Time Scale for Magnetic Reversal
G. L. Celardo, J. Barre, F. Borgonovi +1
We prove the existence of a non-ergodicity threshold for an anisotropic classical Heisenberg model with all-to-all couplings. Below the threshold, the energy surface is disconnecte…
Birth and long-time stabilization of out-of-equilibrium coherent structures
Julien Barre, Freddy Bouchet, Thierry Dauxois +1
We study an analytically tractable model with long-range interactions for which an out-of-equilibrium very long-lived coherent structure spontaneously appears. The dynamics of this…
Finite-size effects on the Hamiltonian dynamics of the XY-model
S. Lepri, S. Ruffo
The dynamical properties of the finite-size magnetization M in the critical region T<T_{KTB} of the planar rotor model on a L x L square lattice are analyzed by means of microcanon…
Violation of ensemble equivalence in the antiferromagnetic mean-field XY model
Thierry Dauxois, Peter Holdsworth, Stefano Ruffo
It is well known that long-range interactions pose serious problems for the formulation of statistical mechanics. We show in this paper that ensemble equivalence is violated in a s…