Level spacings and periodic orbits

Details Level spacings and periodic orbits Level spacings and periodic orbits

2000-12-19

arxiv.org/abs/nlin/0012038v2

Phys. Rev. E 64 (2001) 027201

Nonlinear Sciences

Chaotic Dynamics

4 pages, 2 figures; major revisions in the second part, range of validity of asymptotic evaluation clarified

Scientific paper

10.1103/PhysRevE.64.027201

Starting from a semiclassical quantization condition based on the trace formula, we derive a periodic-orbit formula for the distribution of spacings of eigenvalues with k intermediate levels. Numerical tests verify the validity of this representation for the nearest-neighbor level spacing (k=0). In a second part, we present an asymptotic evaluation for large spacings, where consistency with random matrix theory is achieved for large k. We also discuss the relation with the method of Bogomolny and Keating [Phys. Rev. Lett. 77 (1996) 1472] for two-point correlations.

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