title: Coherent manipulation of electron spins up to ambient temperatures in Cr5+ (S = 1/2) doped K3NbO8.
abstract: We report coherent spin manipulation on Cr(5+) (S = 1/2, I = 0) doped K(3)NbO(8), which constitutes a dilute two-level model relevant for use as a spin qubit. Rabi oscillations are observed for the first time in a spin system based on transition metal oxides up to room temperature. At liquid helium temperature the phase coherence relaxation time T2 reaches approximately 10 micros and, with a Rabi frequency of 20 MHz, yields a single-qubit figure of merit Q(M) of about 500. This shows that a diluted ensemble of Cr(5+) (S = 1/2) doped K(3)NbO(8) is a potential candidate for solid-state quantum information processing.
authors.affiliation: National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA.
authors.forename: S
authors.initials: S
authors.lastname: Nellutla
authors.forename: K-Y
authors.initials: KY
authors.lastname: Choi
authors.forename: M
authors.initials: M
authors.lastname: Pati
authors.forename: J
authors.initials: J
authors.lastname: van Tol
authors.forename: I
authors.initials: I
authors.lastname: Chiorescu
authors.forename: N S
authors.initials: NS
authors.lastname: Dalal