arxiv: cond-mat/0303433 · v3 · submitted 2003-03-20 · ❄️ cond-mat.mes-hall · cond-mat.supr-con· quant-ph

Continuous Monitoring of Rabi Oscillations in a Josephson Flux Qubit

E. Il'ichev , N. Oukhanski , A. Izmalkov , Th. Wagner , M. Grajcar , H.-G. Meyer , A.Yu. Smirnov , Alec Maassen van den Brink

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M.H.S. Amin A.M. Zagoskin

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classification ❄️ cond-mat.mes-hall cond-mat.supr-conquant-ph

keywords rabioscillationsqubitfluxtimeadditioncircuitcoherence

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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 microseconds, corresponding to an effective qubit quality factor \~7000.

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Continuous Monitoring of Rabi Oscillations in a Josephson Flux Qubit

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