title: Microwave experiments in the realm of fidelity.
abstract: In this review article, we will demonstrate the power of microwave experiments in the realm of fidelity also known as Loschmidt echoes. As the determination of the fidelity itself is experimentally tedious and error prone, we will introduce the scattering fidelity which under the conditions of chaotic systems and weak coupling approaches the fidelity itself. The main ingredient in fidelity investigations is the type and strength of a perturbation. The perturbations presented here will be both global and local boundary perturbations, as well as local perturber movements but also the change of coupling to the environment. All these perturbations will produce their own fidelity decay as a function of the perturbation strength, which will be discussed in this article.
authors.affiliation: Laboratoire de Physique de la Matière Condensée, Université Nice-Sophia Antipolis, CNRS, UMR 7336 Parc Valrose, Nice 06100, France ulrich.kuhl@unice.fr.
authors.forename: U
authors.identifier: http://orcid.org/0000-0002-1797-4683
authors.initials: U
authors.lastname: Kuhl
keywords: Loschmidt echo; fidelity; microwave experiments; quantum chaos