Abstract
We consider a two-level system (TLS) with energy level separation inside a Josephson junction. The junction is shunted by a resistor and is voltage biased. If the TLS modulates the Josephson energy and/or is optically active, it is Rabi driven by the Josephson oscillations in the running phase regime near the resonance . The Rabi oscillations, in turn, translate into oscillations of current and voltage that can be detected in noise measurements. This effect provides an option to fully characterize the TLS inside Josephson junction and to find the TLS’s contribution to the decoherence when the junction is used as a qubit.
- Received 7 March 2005
DOI:https://doi.org/10.1103/PhysRevLett.95.127002
©2005 American Physical Society