title: Effective Hamiltonian for chaotic coupled oscillators.
abstract: A generalized effective fitting Hamiltonian is tested against a model system of highly excited coupled Morse oscillators. At energies approaching dissociation, a very few resonance couplings in addition to the standard 1:1 and 2:2 couplings of the Darling-Dennison Hamiltonian suffice to fit the spectrum and match the large-scale features of the mixed regular and chaotic phase spaces, consisting of resonance zones organized around periodic orbits of low order that break the total polyad action.
authors.affiliation: Institute of Theoretical Science and Department of Chemistry, University of Oregon, Eugene, Oregon 97403, USA.
authors.forename: Aniruddha
authors.initials: A
authors.lastname: Chakraborty
authors.forename: Michael E
authors.initials: ME
authors.lastname: Kellman