Integrable Approximation of Regular Islands: The Iterative Canonical Transformation Method

Abstract

Generic Hamiltonian systems have a mixed phase space, where classically disjoint regions of regular and chaotic motion coexist. We present an iterative method to construct an integrable approximation, which resembles the regular dynamics of a given mixed system and extends it into the chaotic region. The method is based on the construction of an integrable approximation in action representation which is then improved in phase space by iterative applications of canonical transformations. This method works for strongly perturbed systems and arbitrary degrees of freedom. We apply it to the standard map and the cosine billiard.

13 pages, 12 figures

References in corpus (5)

• Regular-to-Chaotic Tunneling Rates: From the Quantum to the Semiclassical Regime
• Dynamical tunneling in mushroom billiards
• Regular-to-chaotic tunneling rates using a fictitious integrable system
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Cited by in corpus (5)

• Perturbation-Free Prediction of Resonance-Assisted Tunneling in Mixed Regular--Chaotic Systems
• Effective time-independent analysis for quantum kicked systems
• Complex-Path Prediction of Resonance-Assisted Tunneling in Mixed Systems
• Finding Hannay angle in dissipative oscillatory systems via conservative perturbation theory
• Integrable approximation of regular regions with a nonlinear resonance chain