Theory of Josephson photomultipliers: Optimal working conditions and back action
Theory of Josephson photomultipliers: Optimal working conditions and back action
We describe the back action of microwave-photon detection via a Josephson photomultiplier (JPM), a superconducting qubit coupled strongly to a high-quality microwave cavity. The back-action operator depends qualitatively on the duration of the measurement interval, resembling the regular photon annihilation operator at short interaction times and approaching a variant of …