Semiclassical form factor for spectral, and matrix element fluctuations of multidimensional chaotic systems

M Turek*, D Spehner, S Muller, K Richter

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

13 Citations (Scopus)

Abstract

We present a semiclassical calculation of the generalized form factor K-ab(tau) which characterizes the fluctuations of matrix elements of the operators (a) over cap and (b) over cap in the eigenbasis of the Hamiltonian of a chaotic system. Our approach is based on some recently developed techniques for the spectral form factor of systems with hyperbolic and ergodic underlying classical dynamics and f=2 degrees of freedom, that allow us to go beyond the diagonal approximation. First we extend these techniques to systems with f>2. Then we use these results to calculate K-ab(tau). We show that the dependence on the rescaled time tau (time in units of the Heisenberg time) is universal for both the spectral and the generalized form factor. Furthermore, we derive a relation between K-ab(tau) and the classical time-correlation function of the Weyl symbols of (a) over cap and (b) over cap.

Original languageEnglish
Article number016210
Number of pages15
JournalPhysical Review E: Statistical, Nonlinear, and Soft Matter Physics
Volume71
Issue number1
DOIs
Publication statusPublished - Jan 2005

Keywords

  • STATES
  • ERGODICITY
  • EIGENFUNCTIONS
  • TIME-REVERSAL
  • DIAGONAL APPROXIMATION
  • TRACE FORMULA
  • QUANTUM-SYSTEMS
  • HYPERBOLIC SYSTEMS
  • STATISTICS
  • PERIODIC-ORBITS

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