Photon statistics of one- and two-photon subtracted states at telecom wavelength reconstructed via direct detection

Photon-number-resolving superconducting photon detectors promise to simplify detection schemes where only photon statistics matters in the few-photon regimes. Employed in one- and two-photon subtraction protocols, they allowed reconstruction of the photon number distribution for coherent and thermal states obtained from a pulsed laser at telecom wavelengths. The experimental setup is based on photon detection events recorded using a photon-number-resolving detector based on an array of eight superconducting NbN nanostrips working at 2.2 K. Photon subtraction was implemented using a low-reflectivity beam splitter and two superconducting nanostrip single photon detectors with an efficiency higher than 90% and a dark count rate of 1 cps. Our results confirm that our scheme accurately reproduces the theoretically expected effects of the annihilation operator on the states, achieving a fidelity higher than 99%.

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Publication Details

Journal
Optics Express
Published
2025-06-30
DOI
https://doi.org/10.1364/oe.568296
Primary Topic
Quantum Information and Cryptography
Type
article
Field-Weighted Citation Impact
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article

Photon statistics of one- and two-photon subtracted states at telecom wavelength reconstructed via direct detection

Ciro Bruscino, Giovanni Piero Pepe, Lixing You, Pasquale Ercolano et al.
Optics Express
Quantum Information and Cryptography
article

Photon statistics of one- and two-photon subtracted states at telecom wavelength reconstructed via direct detection

Ciro Bruscino, Giovanni Piero Pepe, Lixing You, Pasquale Ercolano, Daniela Salvoni, Jia Huang, L. Parlato, A. Porzio, Hao Li, Chengjun Zhang, Martina Peluso, mikkel erjnaes
article en

Abstract

Photon-number-resolving superconducting photon detectors promise to simplify detection schemes where only photon statistics matters in the few-photon regimes. Employed in one- and two-photon subtraction protocols, they allowed reconstruction of the photon number distribution for coherent and thermal states obtained from a pulsed laser at telecom wavelengths. The experimental setup is based on photon detection events recorded using a photon-number-resolving detector based on an array of eight superconducting NbN nanostrips working at 2.2 K. Photon subtraction was implemented using a low-reflectivity beam splitter and two superconducting nanostrip single photon detectors with an efficiency higher than 90% and a dark count rate of 1 cps. Our results confirm that our scheme accurately reproduces the theoretically expected effects of the annihilation operator on the states, achieving a fidelity higher than 99%.

Optics ExpressVol. 33(16)
Università degli studi di Cassino e del Lazio Meridionale (IT), Superconducting and other Innovative Materials and Devices Institute (IT), Photonic Science (United Kingdom) (GB), Mannatech (United States) (US), Shanghai Institute of Microsystem and Information Technology (CN)
Openalex Percentile: Top 92%
Quantum Information and Cryptography
DOIOpen Access PDFOpenAlex
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