Generation of highly pure single-photon state at telecommunication wavelength

Telecommunication wavelength with well-developed optical communication technologies and low losses in the waveguide are advantageous for quantum applications. However, an experimental generation of non-classical states called non-Gaussian states at the telecommunication wavelength is still underdeve...

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Bibliographic Details
Published in:Optics express 2022-07, Vol.30 (14), p.24831-24840
Main Authors: Kawasaki, Akito, Takase, Kan, Nomura, Takefumi, Miki, Sigehito, Terai, Hirotaka, Yabuno, Masahiro, China, Fumihiro, Asavanant, Warit, Endo, Mamoru, Yoshikawa, Jun-ichi, Furusawa, Akira
Format: Article
Language:English
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Summary:Telecommunication wavelength with well-developed optical communication technologies and low losses in the waveguide are advantageous for quantum applications. However, an experimental generation of non-classical states called non-Gaussian states at the telecommunication wavelength is still underdeveloped. Here, we generate highly-pure-single-photon states, one of the most primitive non-Gaussian states, by using a heralding scheme with an optical parametric oscillator and a superconducting nano-strip photon detector. The Wigner negativity, the indicator of non-classicality, of the generated single photon state is -0.228 ± 0.004, corresponded to 85.1 ± 0.7% of single photon and the best record of the minimum value at all wavelengths. The quantum-optics-technology we establish can be easily applied to the generation of various types of quantum states, opening up the possibility of continuous-variable-quantum-information processing at the telecommunication wavelength.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.460583