Remarks on perturbation theory for Hamiltonian systems

Details Remarks on perturbation theory for Hamiltonian systems Remarks on perturbation theory for Hamiltonian systems

2001-01-04

arxiv.org/abs/physics/0101026v1

Nonlinear Phenomena in Complex Systems, 2:2 (1999) 35-43

Physics

Classical Physics

Lecture given at 3rd International Summer School/Conference, Let's face chaos through nonlinear dynamics, Maribor, Slovenia, 2

Scientific paper

A comparative discussion of the normal form and action angle variable method is presented in a tutorial way. Normal forms are introduced by Lie series which avoid mixed variable canonical transformations. The main interest is focused on establishing a third integral of motion for the transformed Hamiltonian truncated at finite order of the perturbation parameter. In particular, for the case of the action angle variable scheme, the proper canonical transformations are worked out which reveal the third integral in consistency with the normal form. Details are discussed exemplarily for the Henon-Heiles Hamiltonian. The main conclusions are generalized to the case of n perturbed harmonic oscillators.

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