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2003•arXiv (Cornell University)Open access

Continuous Observation of Rabi Oscillations in a Josephson Flux Qubit

E. V. Il’ichev, Nikolai Oukhanski, A. Izmalkov, Th. Wagner, M. Grajcar, H.‐G. Meyer, Anatoly Yu. Smirnov, Alec Maassen van den Brink, M. H. S. Amin, Alexandre M. Zagoskin

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Abstract

Under resonant irradiation, a quantum system can undergo coherent (Rabi) oscillations in time. We report their first_continuous_ observation in a three-Josephson-junction flux qubit, coupled to a high-quality tank circuit tuned to the Rabi frequency. In addition to robustness and simplicity, this method of_Rabi spectroscopy_ enabled a long coherence time of about 2.5microseconds, corresponding to an effective qubit quality factor ~7000.

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Under resonant irradiation, a quantum system can undergo coherent (Rabi) oscillations in time. We report their first_continuous_ observation in a three-Josephson-junction flux qubit, coupled to a high-quality tank circuit tuned to the Rabi frequency. In addition to robustness and simplicity, this method of_Rabi spectroscopy_ enabled a long coherence time of about 2.5microseconds, corresponding to an effective qubit quality factor ~7000.

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Available abstract

Under resonant irradiation, a quantum system can undergo coherent (Rabi) oscillations in time. We report their first_continuous_ observation in a three-Josephson-junction flux qubit, coupled to a high-quality tank circuit tuned to the Rabi frequency. In addition to robustness and simplicity, this method of_Rabi spectroscopy_ enabled a long coherence time of about 2.5microseconds, corresponding to an effective qubit quality factor ~7000.

Key concepts: Flux qubit, Rabi cycle, Phase qubit, Rabi frequency, Qubit, Josephson effect, Charge qubit, Physics

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