Issue
EPL
Volume 85, Number 1, January 2009
Article Number 14004
Number of page(s) 6
Section Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics
DOI http://dx.doi.org/10.1209/0295-5075/85/14004
Published online 15 January 2009
EPL, 85 (2009) 14004
DOI: 10.1209/0295-5075/85/14004

Dynamics of nonlinear resonances in Hamiltonian systems

M. D. Bustamante1 and E. Kartashova2

1   Mathematics Institute, University of Warwick - Coventry CV4 7AL, UK, EU
2   RISC, J. Kepler University - Linz 4040, Austria, EU

mig_busta@yahoo.com
lena@risc.uni-linz.ac.at

received 22 October 2008; accepted in final form 28 November 2008; published January 2009
published online 15 January 2009

Abstract
It is well known that the dynamics of a Hamiltonian system depends crucially on whether or not it possesses nonlinear resonances. In the generic case, the set of nonlinear resonances consists of independent clusters of resonantly interacting modes, described by a few low-dimensional dynamical systems. We formulate and prove a new theorem on integrability which allows us to show that most frequently met clusters are described by integrable dynamical systems. We argue that construction of clusters can be used as the base for the Clipping method, substantially more effective for these systems than the Galerkin method. The results can be used directly for systems with cubic Hamiltonian.

PACS
47.10.Df - Hamiltonian formulations.
47.10.Fg - Dynamical systems methods.
02.70.Dh - Finite-element and Galerkin methods.

© EPLA 2009