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Entanglement distribution over 150 km in wavelength division multiplexed channels for quantum cryptography

Laser & photonics reviews, 2016-05, Vol.10 (3) [Peer Reviewed Journal]

Distributed under a Creative Commons Attribution 4.0 International License ;ISSN: 1863-8880 ;EISSN: 1863-8899 ;DOI: 10.1002/lpor.201500258

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  • Title:
    Entanglement distribution over 150 km in wavelength division multiplexed channels for quantum cryptography
  • Author: Aktas, Djeylan ; Fedrici, Bruno ; Kaiser, Florian ; Lunghi, Tommaso ; Labonté, Laurent ; Tanzilli, Sébastien
  • Subjects: Physics ; Quantum Physics
  • Is Part Of: Laser & photonics reviews, 2016-05, Vol.10 (3)
  • Description: Granting information privacy is of crucial importance in our society, notably in fiber communication networks. Quantum cryptography provides a unique means to establish, at remote locations, identical strings of genuine random bits, with a level of secrecy unattainable using classical resources. However, several constraints, such as non-optimized photon number statistics and resources, detectors' noise, and optical losses, currently limit the performances in terms of both achievable secret key rates and distances. Here, these issues are addressed using an approach that combines both fundamental and off-the-shelves technological resources. High-quality bipartite photonic entanglement is distributed over a 150 km fiber link, exploiting a wavelength demultiplexing strategy implemented at the end-user locations. It is shown how coincidence rates scale linearly with the number of employed telecommunication channels, with values outperforming previous realizations by almost one order of magnitude. Thanks to its potential of scalability and compliance with device-independent strategies, this system is ready for real quantum applications, notably entanglement-based quantum cryptography.
  • Publisher: Wiley-VCH Verlag
  • Language: English
  • Identifier: ISSN: 1863-8880
    EISSN: 1863-8899
    DOI: 10.1002/lpor.201500258
  • Source: Hyper Article en Ligne (HAL) (Open Access)
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