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 , corresponding to an effective qubit quality factor .
- Received 21 March 2003
DOI:https://doi.org/10.1103/PhysRevLett.91.097906
©2003 American Physical Society