Theory of Josephson Radiation. I. General Theory
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We consider the problem of a Josephson junction interacting with a quantized electromagnetic field contained in a microwave cavity. Inasmuch as the cavity has a quality factor Q, and an external current J flows in and out of the junction, this is a problem in nonequilibrium statistical mechanics. We use a technique that eliminates adiabatically the radiation field directly from the total-density-matrix equation of motion. The resulting equation for the reduced density matrix is found to have a simple physical interpretation. The spectrum of the voltage fluctuations and the linewidth of the emitted radiation are then calculated for the case when the resonance cavity is at absolute zero. 1971 The American Physical Society.
author list (cited authors)
Lee, P. A., & Scully, M. O.
complete list of authors
Lee, Patrick A||Scully, Marlan O