Quantum detector tomography of superconducting nanostrip photon-number-resolving detector

• URL: http://arxiv.org/abs/2102.09712v1
• Date: Fri, 19 Feb 2021 02:19:19 GMT
• Title: Quantum detector tomography of superconducting nanostrip photon-number-resolving detector
• Authors: Mamoru Endo, Tatsuki Sonoyama, Mikihisa Matsuyama, Fumiya Okamoto, Shigehito Miki, Masahiro Yabuno, Fumihiro China, Hirotaka Terai, and Akira Furusawa
• Abstract summary: We improve the photon-number-resolving performance for light with a high-average photon number by pattern matching of the output signal waveform. The device has photon-number-resolving performance up to five photons without any multiplexing or arraying.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Superconducting nanostrip photon detectors have been used as single photon detectors, which can discriminate only photons' presence or absence. It has recently been found that they can discriminate the number of photons by analyzing the output signal waveform, and they are expected to be used in various fields, especially in optical quantum information processing. Here, we improve the photon-number-resolving performance for light with a high-average photon number by pattern matching of the output signal waveform. Furthermore, we estimate the positive-operator-valued measure of the detector by a quantum detector tomography. The result shows that the device has photon-number-resolving performance up to five photons without any multiplexing or arraying, indicating that it is useful as a photon-number-resolving detector.

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