Nonlinear Sciences – Chaotic Dynamics
Scientific paper
1999-05-31
Phys. Rev. E 61, 1320 (2000)
Nonlinear Sciences
Chaotic Dynamics
10 pages, 5 figures
Scientific paper
10.1103/PhysRevE.61.1320
We analyze the stability of invariant tori for Hamiltonian systems with two degrees of freedom by constructing a transformation that combines Kolmogorov-Arnold-Moser theory and renormalization-group techniques. This transformation is based on the continued fraction expansion of the frequency of the torus. We apply this transformation numerically for arbitrary frequencies that contain bounded entries in the continued fraction expansion. We give a global picture of renormalization flow for the stability of invariant tori, and we show that the properties of critical (and near critical) tori can be obtained by analyzing renormalization dynamics around a single hyperbolic strange attractor. We compute the fractal diagram, i.e., the critical coupling as a function of the frequencies, associated with a given one-parameter family.
Chandre Cristel
Jauslin Hans-Rudolf
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