title: Rabi oscillations at exceptional points in microwave billiards.
abstract: We experimentally investigated the decay behavior with time t of resonances near and at exceptional points, where two complex eigenvalues and also the associated eigenfunctions coalesce. The measurements were performed with a dissipative microwave billiard, whose shape depends on two parameters. The t2 dependence predicted at the exceptional point on the basis of a two-state matrix model could be verified. Outside the exceptional point the predicted Rabi oscillations, also called quantum echoes in this context, were detected.
authors.affiliation: Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Dietz
authors.forename: T
authors.initials: T
authors.lastname: Friedrich
authors.forename: J
authors.initials: J
authors.lastname: Metz
authors.forename: M
authors.initials: M
authors.lastname: Miski-Oglu
authors.forename: A
authors.initials: A
authors.lastname: Richter
authors.forename: F
authors.initials: F
authors.lastname: Schäfer
authors.forename: C A
authors.initials: CA
authors.lastname: Stafford