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Experimental quantum fingerprinting with weak coherent pulses

Author

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  • Feihu Xu

    (Center for Quantum Information and Quantum Control, University of Toronto
    University of Toronto
    University of Toronto
    Present address: Research Laboratory of Electronics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.)

  • Juan Miguel Arrazola

    (Institute for Quantum Computing, University of Waterloo
    University of Waterloo)

  • Kejin Wei

    (Center for Quantum Information and Quantum Control, University of Toronto
    University of Toronto
    University of Toronto
    School of Science and State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications)

  • Wenyuan Wang

    (Center for Quantum Information and Quantum Control, University of Toronto
    University of Toronto
    University of Toronto
    University of Hong Kong)

  • Pablo Palacios-Avila

    (Institute for Quantum Computing, University of Waterloo
    University of Waterloo
    Faculty of Science, National University of Engineering)

  • Chen Feng

    (School of Engineering, University of British Columbia)

  • Shihan Sajeed

    (Institute for Quantum Computing, University of Waterloo
    University of Waterloo)

  • Norbert Lütkenhaus

    (Institute for Quantum Computing, University of Waterloo
    University of Waterloo)

  • Hoi-Kwong Lo

    (Center for Quantum Information and Quantum Control, University of Toronto
    University of Toronto
    University of Toronto)

Abstract

Quantum communication holds the promise of creating disruptive technologies that will play an essential role in future communication networks. For example, the study of quantum communication complexity has shown that quantum communication allows exponential reductions in the information that must be transmitted to solve distributed computational tasks. Recently, protocols that realize this advantage using optical implementations have been proposed. Here we report a proof-of-concept experimental demonstration of a quantum fingerprinting system that is capable of transmitting less information than the best-known classical protocol. Our implementation is based on a modified version of a commercial quantum key distribution system using off-the-shelf optical components over telecom wavelengths, and is practical for messages as large as 100 Mbits, even in the presence of experimental imperfections. Our results provide a first step in the development of experimental quantum communication complexity.

Suggested Citation

  • Feihu Xu & Juan Miguel Arrazola & Kejin Wei & Wenyuan Wang & Pablo Palacios-Avila & Chen Feng & Shihan Sajeed & Norbert Lütkenhaus & Hoi-Kwong Lo, 2015. "Experimental quantum fingerprinting with weak coherent pulses," Nature Communications, Nature, vol. 6(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9735
    DOI: 10.1038/ncomms9735
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    Cited by:

    1. Alghafis, Abdullah & Waseem, Hafiz Muhammad & Khan, Majid & Jamal, Sajjad Shaukat, 2020. "A hybrid cryptosystem for digital contents confidentiality based on rotation of quantum spin states," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 554(C).
    2. Batool, Syeda Iram & Amin, Muhammad & Waseem, Hafiz Muhammad, 2020. "Public key digital contents confidentiality scheme based on quantum spin and finite state automation," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 537(C).

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