Continuous Monitoring of Rabi Oscillations in a Josephson Flux Qubit

Details Continuous Monitoring of Rabi Oscillations in a Josephson Flux Qubit Continuous Monitoring of Rabi Oscillations in a Josephson Flux Qubit

2003-03-20

arxiv.org/abs/cond-mat/0303433v3

Phys. Rev. Lett. 91, 097906 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

REVTeX4, 4pp., 4 EPS figure files. v3: changed title, fixed typos; final, to appear in PRL

Scientific paper

10.1103/PhysRevLett.91.097906

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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