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Dynamical properties are studied for escaping particles, injected through ahole in an oval billiard. The dynamics is considered for both static andperiodically moving boundaries. For the static boundary, two different decaysfor the recurrence time distribution were observed after exponential decay forshort times: A changeover to: (i) power law or; (ii) stretched exponential.Both slower decays are due to sticky orbits trapped near KAM islands, with thestretched exponential apparently associated with a single group of largeislands. For time dependent case, survival probability leads to the conclusionthat sticky orbits are less evident compared with the static case.

Recurrence of particles in static and time varying oval billiards