A superconducting detector that counts microwave photons up to two

Abstract

We propose a detector of microwave photons which can distinguish the vacuum state, one-photon state, and the states with two or more photons. Its operation is based on the two-photon transition in a biased Josephson junction and detection occurs when it switches from a superconducting to a normal state. We model the detector theoretically. The detector performs with more than 90% success probability in several microseconds. It is sensitive for the 8.2GHz photons. The working frequency could be set at the design stage in the range from about 1GHz to 20GHz.

arXiv comment12 pages, 5 figures

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Cited by in corpus (5)

• Propagating Quantum Microwaves: Towards Applications in Communication and Sensing
• Nonclassicality detection from few Fock-state probabilities
• Photon-number resolution with microwave Josephson photomultipliers
• Detector of microwave photon pairs based on a Josephson photomultiplier
• Two-photon coupling via Josephson element I: Breaking the symmetry with magnetic fields