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Resummation and the Turning Points of Zeta Functions

Keating, J.P.

HPL-BRIMS-96-27

Keyword(s): semiclassical quantization; Riemann-Siegel resummation; zeta-functions

Abstract: We review various periodic orbit formulae for the zeta function whose zeros represent semiclassical approximations to the energy levels of chaotic systems. In particular, we focus on the Riemann-Siegel -resummed expression. The emphasis is on the ability of such formulae to reproduce the analytic properties of the spectral determinant, whose zeros are the exact quantum levels. As an example, the distribution of turning points is investigated and compared.

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