52 citations · 183 across the 13 of their papers we have counts for
13 papers
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…
Dynamics of localized modes in a composite multiferroic chain
L. Chotorlishvili, R. Khomeriki, A. Sukhov +2
In a coupled ferroelectric/ferromagnetic system, i.e. a composite multiferroic, the propagation of magnetic or ferroelectric excitations across the whole structure is a key issue f…
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…
Pattern formation and localization in the forced-damped FPU lattice
Ramaz Khomeriki, Stefano Lepri, Stefano Ruffo
We study spatial pattern formation and energy localization in the dynamics of an anharmonic chain with quadratic and quartic intersite potential subject to an optical, sinusoidally…
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…