Chaotic dynamics and superdiffusion in a Hamiltonian system with many degrees of freedom
Abstract
We discuss recent results obtained for the Hamiltonian Mean Field model. The model describes a system of N fully-coupled particles in one dimension and shows a second-order phase transition from a clustered phase to a homogeneous one when the energy is increased. Strong chaos is found in correspondence to the critical point on top of a weak chaotic regime which characterizes the motion at low energies. For a small region around the critical point, we find anomalous (enhanced) diffusion and L\'evy walks in a transient temporal regime before the system relaxes to equilibrium.
Keywords
Cite
@article{arxiv.cond-mat/9911317,
title = {Chaotic dynamics and superdiffusion in a Hamiltonian system with many degrees of freedom},
author = {V. Latora and A. Rapisarda and S. Ruffo},
journal= {arXiv preprint arXiv:cond-mat/9911317},
year = {2009}
}
Comments
7 pages, Latex, 6 figures included, Contributed paper to the Int. Conf. on "Statistical Mechanics and Strongly Correlated System", 2nd Giovanni Paladin Memorial, Rome 27-29 September 1999, submitted to Physica A