Theory of microwave single-photon detection using an impedance-matched $\Lambda$ system

Abstract

By properly driving a qubit-resonator system in the strong dispersive regime, we implement an "impedance-matched" $\Lambda$ system in the dressed states, where a resonant single photon deterministically induces a Raman transition and excites the qubit. Combining this effect and a fast dispersive readout of the qubit, we realize a detector of itinerant microwave photons. We theoretically analyze the single-photon response of the $\Lambda$ system and evaluate its performance as a detector. We achieve a high detection efficiency close to unity without relying on precise temporal control of the input pulse shape and under a conservative estimate of the system parameters. The detector can also be reset quickly by applying microwave pulses, which allows a short dead time and a high repetition rate.

11 pages, 9 figures

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Cited by in corpus (4)

• Chiral Quantum Optics
• Microwave photonics with superconducting quantum circuits
• Chirality-induced one-way quantum steering between two waveguide-mediated ferrimagnetic microspheres
• Dispersive detection of single microwave photons with quantum dots