300 citations · 4.6k across the 133 of their papers we have counts for
9 papers · 1 filter
The Anti-FPU Problem
Thierry Dauxois, Ramaz Khomeriki, Francesco Piazza +1
We present a detailed analysis of the modulational instability of the zone-boundary mode for one and higher-dimensional Fermi-Pasta-Ulam (FPU) lattices. Following this instability,…
Landau-Zener Tunnelling in Waveguide Arrays
Ramaz Khomeriki, Stefano Ruffo
Landau-Zener tunnelling is discussed in connection with optical waveguide arrays. Light injected in a specific band of the Bloch spectrum in the propagation constant can be transmi…
Non-Gaussian Resistance Fluctuations in Disordered Materials
C. Pennetta, E. Alfinito, L. Reggiani +1
We study the distribution of resistance fluctuations of conducting thin films with different levels of internal disorder. The film is modeled as a resistor network in a steady stat…
Apparent fractal dimensions in the HMF model
L. Sguanci, D. H. E. Gross, S. Ruffo
We show that recent observations of fractal dimensions in the -space of -body Hamiltonian systems with long-range interactions are due to finite and finite resolution eff…
Nonlinear supratransmission and bistability in the Fermi-Pasta-Ulam model
Ramaz Khomeriki, Stefano Lepri, Stefano Ruffo
The recently discovered phenomenon of nonlinear supratransmission consists in a sudden increase of the amplitude of a transmitted wave triggered by the excitation of nonlinear loca…
Large deviation techniques applied to systems with long-range interactions
Julien Barre', Freddy Bouchet, Thierry Dauxois +1
We discuss a method to solve models with long-range interactions in the microcanonical and canonical ensemble. The method closely follows the one introduced by Ellis, Physica D 133…