The Classical and Quantum Mechanics of Lazy Baker Maps

Details The Classical and Quantum Mechanics of Lazy Baker Maps The Classical and Quantum Mechanics of Lazy Baker Maps

1993-07-12

arxiv.org/abs/chao-dyn/9307004v1

Nonlinear Sciences

Chaotic Dynamics

27 pages, LaTex file. Figures not included, but available upon request. To appear in Sept. issue of Annals of Physics

Scientific paper

10.1006/aphy.1993.1073

We introduce and study the classical and quantum mechanics of certain non hyperbolic maps on the unit square. These maps are modifications of the usual baker's map and their behaviour ranges from chaotic motion on the whole measure to chaos on a set of measure zero. Thus we have called these maps ``lazy baker maps.'' The aim of introducing these maps is to provide the simplest models of systems with a mixed phase space, in which there are both regular and chaotic motions. We find that despite the obviously contrived nature of these maps they provide a good model for the study of the quantum mechanics of such systems. We notice the effect of a classically chaotic fractal set of measure zero on the corresponding quantum maps, which leads to a transition in the spectral statistics. Some periodic orbits belonging to this fractal set are seen to scar several eigenfunctions.

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