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QUANTUM OPTICS

Long-distance quantum key distribution gets real

Nature Photonics volume 15, pages 554–556 (2021)Cite this article

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A ‘twin-field’ repeater-less protocol has enabled an experimental demonstration of secure quantum key distribution over a 511-km long-haul optical fibre link.

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Fig. 1: Twin-field QKD implementation, with the quantum channel shown in black, the synchronization channel in orange and a calibration channel in red.

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Authors and Affiliations

  1. National University of Singapore, Singapore, Singapore

    Charles C.-W. Lim & Chao Wang

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  1. Charles C.-W. Lim
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  2. Chao Wang
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Correspondence to Charles C.-W. Lim.

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Lim, C.CW., Wang, C. Long-distance quantum key distribution gets real. Nat. Photon. 15, 554–556 (2021). https://doi.org/10.1038/s41566-021-00848-1

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