Continuous Monitoring of Rabi Oscillations in a Josephson Flux Qubit
arXiv:cond-mat/0303433 · 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 microseconds, corresponding to an effective qubit quality factor \~7000.
REVTeX4, 4pp., 4 EPS figure files. v3: changed title, fixed typos; final, to appear in PRL