title: Continuous monitoring of Rabi oscillations in a Josephson flux qubit.
abstract: Under resonant irradiation, a quantum system can undergo coherent (Rabi) oscillations in time. We report evidence for such oscillations in a continuously observed three-Josephson-junction flux qubit, coupled to a high-quality tank circuit tuned to the Rabi frequency. In addition to simplicity, this method of Rabi spectroscopy enabled a long coherence time of about 2.5 micros, corresponding to an effective qubit quality factor approximately 7000.
authors.affiliation: Institute for Physical High Technology, P.O. Box 100239, D-07702 Jena, Germany.
authors.forename: E
authors.initials: E
authors.lastname: Il'ichev
authors.forename: N
authors.initials: N
authors.lastname: Oukhanski
authors.forename: A
authors.initials: A
authors.lastname: Izmalkov
authors.forename: Th
authors.initials: T
authors.lastname: Wagner
authors.forename: M
authors.initials: M
authors.lastname: Grajcar
authors.forename: H-G
authors.initials: HG
authors.lastname: Meyer
authors.forename: A Yu
authors.initials: AY
authors.lastname: Smirnov
authors.forename: Alec
authors.initials: A
authors.lastname: Maassen van den Brink
authors.forename: M H S
authors.initials: MH
authors.lastname: Amin
authors.forename: A M
authors.initials: AM
authors.lastname: Zagoskin