Continuous monitoring of Rabi oscillations in a Josephson flux qubit

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...

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Bibliographic Details
Published in:Physical review letters 2003-08, Vol.91 (9), p.097906-097906, Article 097906
Main Authors: Il'ichev, E, Oukhanski, N, Izmalkov, A, Wagner, Th, Grajcar, M, Meyer, H-G, Smirnov, A Yu, Maassen van den Brink, Alec, Amin, M H S, Zagoskin, A M
Format: Article
Language:English
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Summary: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 micros, corresponding to an effective qubit quality factor approximately 7000.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.91.097906