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Fundamental rate-loss trade-off for the quantum internet

Author

Listed:
  • Koji Azuma

    (NTT Basic Research Laboratories, NTT Corporation)

  • Akihiro Mizutani

    (Graduate School of Engineering Science, Osaka University)

  • Hoi-Kwong Lo

    (Center for Quantum Information and Quantum Control (CQIQC), University of Toronto
    University of Toronto, 60 St. George St.
    University of Toronto, 10 King's College Road)

Abstract

The quantum internet holds promise for achieving quantum communication—such as quantum teleportation and quantum key distribution (QKD)—freely between any clients all over the globe, as well as for the simulation of the evolution of quantum many-body systems. The most primitive function of the quantum internet is to provide quantum entanglement or a secret key to two points efficiently, by using intermediate nodes connected by optical channels with each other. Here we derive a fundamental rate-loss trade-off for a quantum internet protocol, by generalizing the Takeoka–Guha–Wilde bound to be applicable to any network topology. This trade-off has essentially no scaling gap with the quantum communication efficiencies of protocols known to be indispensable to long-distance quantum communication, such as intercity QKD and quantum repeaters. Our result—putting a practical but general limitation on the quantum internet—enables us to grasp the potential of the future quantum internet.

Suggested Citation

  • Koji Azuma & Akihiro Mizutani & Hoi-Kwong Lo, 2016. "Fundamental rate-loss trade-off for the quantum internet," Nature Communications, Nature, vol. 7(1), pages 1-8, December.
  • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms13523
    DOI: 10.1038/ncomms13523
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    Cited by:

    1. Dashiell LP Vitullo & Trevor Cook & Daniel E Jones & Lisa M Scott & Andrew Toth & Brian T Kirby, 2024. "Simulating quantum key distribution in fiber-based quantum networks," The Journal of Defense Modeling and Simulation, , vol. 21(4), pages 463-486, October.

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