Output functions and fractal dimensions in dynamical systems

Details Output functions and fractal dimensions in dynamical systems Output functions and fractal dimensions in dynamical systems

2001-01-19

arxiv.org/abs/nlin/0101036v1

Nonlinear Sciences

Chaotic Dynamics

Uses REVTEX; to be published in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.86.2778

We present a novel method for the calculation of the fractal dimension of boundaries in dynamical systems, which is in many cases many orders of magnitude more efficient than the uncertainty method. We call it the Output Function Evaluation (OFE) method. The OFE method is based on an efficient scheme for computing output functions, such as the escape time, on a one-dimensional portion of the phase space. We show analytically that the OFE method is much more efficient than the uncertainty method for boundaries with $D<0.5$, where $D$ is the dimension of the intersection of the boundary with a one-dimensional manifold. We apply the OFE method to a scattering system, and compare it to the uncertainty method. We use the OFE method to study the behavior of the fractal dimension as the system's dynamics undergoes a topological transition.

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