Nonlinear Sciences – Chaotic Dynamics
Scientific paper
2009-06-26
Path Integrals - New Trends and Perspectives: Proc 9th Int Conf (Dresden), eds W Janke and A Pelster (Singapore: World Scienti
Nonlinear Sciences
Chaotic Dynamics
7 pages, 5 figures
Scientific paper
Long periodic orbits of hyperbolic dynamics do not exist as independent individuals but rather come in closely packed bunches. Under weak resolution a bunch looks like a single orbit in configuration space, but close inspection reveals topological orbit-to-orbit differences. The construction principle of bunches involves close self-"encounters" of an orbit wherein two or more stretches stay close. A certain duality of encounters and the intervening "links" reveals an infinite hierarchical structure of orbit bunches. -- The orbit-to-orbit action differences $\Delta S$ within a bunch can be arbitrarily small. Bunches with $\Delta S$ of the order of Planck's constant have constructively interfering Feynman amplitudes for quantum observables, and this is why the classical bunching phenomenon could yield the semiclassical explanation of universal fluctuations in quantum spectra and transport.
Altland Alexander
Braun Petr
Haake Fritz
Heusler Stefan
Knieper Gerhard
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