title: Experimental demonstration of the rotational frequency shift in a molecular system.
abstract: The frequency shift expected to occur analogously to the Doppler effect when an emitting quantum system is forced to rotate [Phys. Rev. Lett. 78, 2539 (1997)] has been detected for the first time, and verified quantitatively. The experimental conditions were chosen such that the most general case was realized where perturbation theory is not applicable. Circularly polarized visible laser light tuned to a rovibronic transition, and a rotating radio-frequency electric field were applied to the strongly polar molecule H2CS in a gaseous sample.
authors.affiliation: Abteilung Quanteninformationsverarbeitung, Universität Ulm, D-89081 Ulm, Germany. marcin.michalski@mytum.de
authors.forename: Marcin
authors.initials: M
authors.lastname: Michalski
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Hüttner
authors.forename: Hartmut
authors.initials: H
authors.lastname: Schimming