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Phys. Rev. E 74, 066208 (2006) [5 pages]

Spectral form factor near the Ehrenfest time

Piet W. Brouwer and Saar Rahav
1Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA

Chushun Tian
2Institut für Theoretische Physik, Universität zu Köln, Köln, 50937, Germany
Received 13 July 2006; revised 18 October 2006; published 28 December 2006

We calculate the Ehrenfest-time dependence of the leading quantum correction to the spectral form factor of a ballistic chaotic cavity using periodic orbit theory. For the case of broken time-reversal symmetry, when the quantum correction to the form factor involves two small-angle encounters of classical trajectories, our result differs from that previously obtained using field-theoretic methods [Tian and Larkin, Phys. Rev. B 70, 035305 (2004)]. While we believe that the existing field-theoretic calculation is technically flawed, the question whether the field theoretic and periodic-orbit approaches agree when more than one small-angle encounter of classical orbits is involved remains unanswered.

©2006 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevE.74.066208
DOI: 10.1103/PhysRevE.74.066208
PACS: 05.45.Mt; 73.20.Fz
  • 05.45.Mt
    Semiclassical methods in quantum chaos
  • 73.20.Fz
    Weak or Anderson localization (surface/interface states)
  • YEAR: 2006
KEYWORDS: chaos, quantum theory

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