Fidelity decay for local perturbations: microwave evidence for oscillating decay exponents

Bernd Köber*, Ulrich Kuhl, Hans Jürgen Stöckmann, Arseni Goussev, Klaus Richter

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We study fidelity decay in classically chaotic microwave billiards for a local, pistonlike boundary perturbation. We experimentally verify a predicted nonmonotonic crossover from the Fermi golden rule to the escape-rate regime of the Loschmidt echo decay with increasing local boundary perturbation. In particular, we observe pronounced oscillations of the decay rate as a function of the piston position which quantitatively agree with corresponding theoretical results based on a refined semiclassical approach for local boundary perturbations.

Original languageEnglish
Article number016214
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume83
Issue number1
DOIs
Publication statusPublished - 31 Jan 2011

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