Gutkin, Boris and Waltner, Daniel and Gutierrez, Martha and Kuipers, Jack and Richter, Klaus (2010) Quantum corrections to fidelity decay in chaotic systems. PHYSICAL REVIEW E, 81 (3): 036222. ISSN 1539-3755,
Full text not available from this repository.Abstract
By considering correlations between classical orbits we derive semiclassical expressions for the decay of the quantum fidelity amplitude for classically chaotic quantum systems, as well as for its squared modulus, the fidelity or Loschmidt echo. Our semiclassical results for the fidelity amplitude agree with random matrix theory (RMT) and supersymmetry predictions in the universal Fermi-golden rule regime. The calculated quantum corrections can be viewed as arising from a static random perturbation acting on nearly self-retracing interfering paths, and hence will be suppressed for time-varying perturbations. Moreover, using trajectory-based methods we show a relation, recently obtained in RMT, between the fidelity amplitude and the cross-form factor for parametric level correlations. Beyond RMT, we compute Ehrenfest-time effects on the fidelity amplitude. Furthermore our semiclassical approach allows for a unified treatment of the fidelity, both in the Fermi-golden rule and Lyapunov regimes, demonstrating that quantum corrections are suppressed in the latter.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | WEAK-LOCALIZATION; LOSCHMIDT ECHOES; DECOHERENCE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Klaus Richter |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 06 Aug 2020 04:48 |
| Last Modified: | 06 Aug 2020 04:48 |
| URI: | https://pred.uni-regensburg.de/id/eprint/25129 |
Actions (login required)
 |
View Item |
