Proof-of-principle experimental demonstration of twin-field quantum key distribution over asymmetric channels

Xiaoqing Zhong; Wenyuan Wang; Li Qian; Hoi-Kwong Lo; Hoi-Kwong Lo

doi:10.1364/CLEO_QELS.2020.FF3C.1

Conference on Lasers and Electro-Optics
OSA Technical Digest (Optica Publishing Group, 2020),
paper FF3C.1
•https://doi.org/10.1364/CLEO_QELS.2020.FF3C.1

Proof-of-principle experimental demonstration of twin-field quantum key distribution over asymmetric channels

Xiaoqing Zhong, Wenyuan Wang, Li Qian, and Hoi-Kwong Lo

CLEO: QELS_Fundamental Science 2020

Washington, DC United States
10–15 May 2020
ISBN: 978-1-943580-76-7

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Quantum Communications (FF3C)

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X. Zhong, W. Wang, L. Qian, and H. Lo, "Proof-of-principle experimental demonstration of twin-field quantum key distribution over asymmetric channels," in Conference on Lasers and Electro-Optics, OSA Technical Digest (Optica Publishing Group, 2020), paper FF3C.1.

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Abstract

We demonstrate a first experiment of twin-field quantum key distribution over asymmetric channels. We use asymmetric signal intensities and show that the secret key rate can beat the repeaterless bound at 50 (30+20) dB total loss.

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