Linear stability in billiards with potential

Details Linear stability in billiards with potential Linear stability in billiards with potential

1996-12-16

arxiv.org/abs/chao-dyn/9612023v1

Nonlinearity, 11:151--173, 1998

Nonlinear Sciences

Chaotic Dynamics

22 pages, LaTex, 4 Figures

Scientific paper

10.1088/0951-7715/11/1/010

A general formula for the linearized Poincar\'e map of a billiard with a potential is derived. The stability of periodic orbits is given by the trace of a product of matrices describing the piecewise free motion between reflections and the contributions from the reflections alone. For the case without potential this gives well known formulas. Four billiards with potentials for which the free motion is integrable are treated as examples: The linear gravitational potential, the constant magnetic field, the harmonic potential, and a billiard in a rotating frame of reference, imitating the restricted three body problem. The linear stability of periodic orbits with period one and two is analyzed with the help of stability diagrams, showing the essential parameter dependence of the residue of the periodic orbits for these examples.

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