Structural Invariance and the Energy Spectrum

Details Structural Invariance and the Energy Spectrum Structural Invariance and the Energy Spectrum

1999-02-11

arxiv.org/abs/chao-dyn/9902009v1

J. Phys. A: Math. Gen. (32), 6741-6755, 1999

Nonlinear Sciences

Chaotic Dynamics

10 pages, 5 figures

Scientific paper

10.1088/0305-4470/32/39/303

We extend the application of the concept of structural invariance to bounded time independent systems. This concept, previously introduced by two of us to argue that the connection between random matrix theory and quantum systems with a chaotic classical counterpart is in fact largely exact in the semiclassical limit, is extended to the energy spectra of bounded time independent systems. We proceed by showing that the results obtained previously for the quasi-energies and eigenphases of the S-matrix can be extended to the eigenphases of the quantum Poincare map which is unitary in the semiclassical limit. We then show that its eigenphases in the chaotic case move rather stiffly around the unit circle and thus their local statistical fluctuations transfer to the energy spectrum via Bogomolny's prescription. We verify our results by studying numerically the properties of the eigenphases of the quantum Poincare map for billiards by using the boundary integral method.

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