Bifurcations of periodic orbits and uniform approximations

1997/01/22 by Henning Schomerus, Martin Sieber · 6 citations
Mathematics · Physics and Astronomy · #Quantum chaos and dynamical systems #Spectral Theory in Mathematical Physics #chao-dyn #nlin.CD #stochastic dynamics and bifurcation

paper · pdf · doi:10.1088/0305-4470/30/13/010

published as J. Phys. A 30 (1997) 4537-4562 · LaTeX, 24 pages including 7 PostScript figures, submitted to J. Phys. A

arxiv created 1997/01/22 · openalex publication_date 1997/07/07 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

We derive uniform approximations for contributions to Gutzwiller's periodic-orbit sum for the spectral density which are valid close to bifurcations of periodic orbits in systems with mixed phase space. There, orbits lie close together and give collective contributions, while the individual contributions of Gutzwiller's type would diverge at the bifurcation. New results for the tangent, the period-doubling and the period-tripling bifurcation are given. They are obtained by going beyond the local approximation and including higher-order terms in the normal form of the action. The uniform approximations obtained are tested on the kicked top and are found to be in excellent agreement with exact quantum results.

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