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Title: An integrated silicon photonic chip platform for continuous-variable quantum key distribution
Authors: Zhang, Gong
Haw, J. Y.
Cai, H.
Xu, F.
Assad, S. M.
Fitzsimons, J. F.
Zhou, X.
Zhang, Y.
Yu, S.
Wu, J.
Ser, Wee
Kwek, L. C.
Liu, Ai Qun
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2019
Source: Zhang, G., Haw, J. Y., Cai, H., Xu, F., Assad, S. M., Fitzsimons, J. F., . . . Liu, A. Q. (2019). An integrated silicon photonic chip platform for continuous-variable quantum key distribution. Nature Photonics, 13, 839–842. doi:10.1038/s41566-019-0504-5
Project: MOE2017-T3-1-001
Journal: Nature Photonics
Abstract: Quantum key distribution (QKD) is a quantum communication technology that promises unconditional communication security. High-performance and cost-effective QKD systems are essential for the establishment of quantum communication networks1–3. By integrating all the optical components (except the laser source) on a silicon photonic chip, we have realized a stable, miniaturized and low-cost system for continuous-variable QKD (CV-QKD) that is compatible with the existing fibre optical communication infrastructure4. Here, the integrated silicon photonic chip is demonstrated for CV-QKD. It implements the widely studied Gaussian-modulated coherent state protocol that encodes continuous distributed information on the quadrature of laser light5,6. Our proof-of-principle chip-based CV-QKD system is capable of producing a secret key rate of 0.14 kbps (under collective attack) over a simulated distance of 100 km in fibre, offering new possibilities for low-cost, scalable and portable quantum networks.
ISSN: 1749-4885
DOI: 10.1038/s41566-019-0504-5
Rights: © 2019 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. This paper was published in Nature Photonics and is made available with permission of Macmillan Publishers Limited, part of Springer Nature.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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