2015/01/16 by Kazuki Koshino, K. Inomata, Kunihiro Inomata +3 · 41 citations
Computer Science · Mathematics · Physics and Astronomy · #Algorithm #Detector #Electrical impedance #Lambda #Mathematics #Mechanical and Optical Resonators #Microwave #Optics #Photon #Photon counting #Physics #Pulse (music) #Quantum #Quantum Information and Cryptography #Quantum mechanics #Quantum optics and atomic interactions #Qubit #Repetition (rhetorical device) #Reset (finance) #Resonator #quant-ph
paper · pdf · doi:10.1103/physreva.91.043805
published in Physical Review A 91(4) (American Physical Society) · 11 pages, 9 figures
arxiv created 2015/01/16 · openalex publication_date 2015/04/06 · arxiv updated 2015/04/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
By properly driving a qubit-resonator system in the strong dispersive regime, we implement an ``impedance-matched'' \ensuremathΛ 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 \ensuremathΛ system and evaluate its performance as a detector. We achieve a high detection efficiency 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.