Evolutionary phase space in driven elliptical billiards

Abstract

We perform the first long-time exploration of the classical dynamics of a driven billiard with a four dimensional phase space. With increasing velocity of the ensemble we observe an evolution from a large chaotic sea with stickiness due to regular islands to thin chaotic channels with diffusive motion leading to Fermi acceleration. As a surprising consequence, we encounter a crossover, which is not parameter induced but rather occurs dynamically, from amplitude dependent tunable subdiffusion to universal normal diffusion in momentum space. In the high velocity case we observe particle focusing in phase space.

5 pages, 4 figures

References in corpus (3)

• Hyperacceleration in a stochastic Fermi-Ulam model
• Classical Dynamics of the Time-Dependent Elliptical Billiard
• Scattering Dynamics of Driven Closed Billiards

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