Article,

Continuous Monitoring of Rabi Oscillations in a Josephson Flux Qubit

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Physical Review Letters, 91 (9): 097906+ (August 2003)
DOI: 10.1103/physrevlett.91.097906

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    μ s , corresponding to an effective qubit quality factor ∼7000 .

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