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Particle dynamics in time-dependent stadium-like billiards. (English) Zbl 1124.82310

Summary: Billiards in the form of a stadium with perturbed boundaries are considered. Investigations are primarily devoted to billiards having a near-rectangle form, but the results regarding the “classical” stadium with the boundary that consists of two semicircles and two parallel segments tangent to them, are also described. In the phase plane, areas corresponding to decrease and increase of the velocity of billiard particles are found. The average velocity of the particle ensemble as a function of the number of collisions with the boundary is obtained.

MSC:

82C05 Classical dynamic and nonequilibrium statistical mechanics (general)
37D50 Hyperbolic systems with singularities (billiards, etc.) (MSC2010)
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