Approximating multi-dimensional Hamiltonian flows by billiards

Details Approximating multi-dimensional Hamiltonian flows by billiards Approximating multi-dimensional Hamiltonian flows by billiards

2005-11-30

arxiv.org/abs/nlin/0511071v1

Nonlinear Sciences

Chaotic Dynamics

Scientific paper

Consider a family of smooth potentials $V_{\epsilon}$, which, in the limit $\epsilon\to0$, become a singular hard-wall potential of a multi-dimensional billiard. We define auxiliary billiard domains that asymptote, as $\epsilon\to0$ to the original billiard, and provide asymptotic expansion of the smooth Hamiltonian solution in terms of these billiard approximations. The asymptotic expansion includes error estimates in the $C^{r}$ norm and an iteration scheme for improving this approximation. Applying this theory to smooth potentials which limit to the multi-dimensional close to ellipsoidal billiards, we predict when the separatrix splitting persists for various types of potentials.

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