title: Driving Rydberg-Rydberg transitions from a coplanar microwave waveguide.
abstract: The coherent interaction between ensembles of helium Rydberg atoms and microwave fields in the vicinity of a solid-state coplanar waveguide is reported. Rydberg-Rydberg transitions, at frequencies between 25 and 38 GHz, have been studied for states with principal quantum numbers in the range 30-35 by selective electric-field ionization. An experimental apparatus cooled to 100 K was used to reduce effects of blackbody radiation. Inhomogeneous, stray electric fields emanating from the surface of the waveguide have been characterized in frequency- and time-resolved measurements and coherence times of the Rydberg atoms on the order of 250 ns have been determined. These results represent a key element in the development of an experimental architecture to interface Rydberg atoms with solid-state devices.
authors.affiliation: Laboratorium für Physikalische Chemie, ETH Zürich, Zürich, Switzerland.
authors.forename: S D
authors.initials: SD
authors.lastname: Hogan
authors.forename: J A
authors.initials: JA
authors.lastname: Agner
authors.forename: F
authors.initials: F
authors.lastname: Merkt
authors.forename: T
authors.initials: T
authors.lastname: Thiele
authors.forename: S
authors.initials: S
authors.lastname: Filipp
authors.forename: A
authors.initials: A
authors.lastname: Wallraff