title: First experimental evidence for quantum echoes in scattering systems.
abstract: A self-pulsing effect termed quantum echoes has been observed in experiments with an open superconducting and a normal conducting microwave billiard whose geometry provides soft chaos, i.e., a mixed phase space portrait with a large stable island. For such systems a periodic response to an incoming pulse has been predicted. Its period has been associated with the degree of development of a horseshoe describing the topology of the classical dynamics. The experiments confirm this picture and reveal the topological information.
authors.affiliation: Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Dembowski
authors.forename: B
authors.initials: B
authors.lastname: Dietz
authors.forename: T
authors.initials: T
authors.lastname: Friedrich
authors.forename: H-D
authors.initials: HD
authors.lastname: Gräf
authors.forename: A
authors.initials: A
authors.lastname: Heine
authors.forename: C
authors.initials: C
authors.lastname: Mejía-Monasterio
authors.forename: M
authors.initials: M
authors.lastname: Miski-Oglu
authors.forename: A
authors.initials: A
authors.lastname: Richter
authors.forename: T H
authors.initials: TH
authors.lastname: Seligman