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Long-distance quantum key distribution gets real
Nature Photonics  (IF38.771),  Pub Date : 2021-07-06, DOI: 10.1038/s41566-021-00848-1
Charles C.-W. Lim, Chao Wang

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.