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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·M. H. S. Amin·A. M. Zagoskin
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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 microseconds, corresponding to an effective qubit quality factor \~7000.

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E. Il'ichev, N. Oukhanski, A. Izmalkov, Th. Wagner, M. Grajcar, H. -G. Meyer, A. Yu. Smirnov, Alec Maassen van den Brink, M. H. S. Amin, A. M. Zagoskin. 2003-08-19. Continuous Monitoring of Rabi Oscillations in a Josephson Flux Qubit. https://doi.org/10.1103/physrevlett.91.097906

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