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Abstract

During the last 20 years, the advance of communication technologies has generated multiple exciting applications. However, classical cryptography, commonly adopted to secure current communication systems, can be jeopardised by the advent of quantum computers. Quantum key distribution (QKD) is a promising technology aiming to solve such a security problem. Unfortunately, current implementations of QKD systems show relatively low key rates, demand low channel noise and use ad hoc devices. In this work, we picture how to overcome the rate limitation by using a 37-core fibre to generate 2.86 Mbit s−1 per core that can be space multiplexed into the highest secret key rate of 105.7 Mbit s−1 to date. We also demonstrate, with off-the-shelf equipment, the robustness of the system by co-propagating a classical signal at 370 Gbit s− 1, paving the way for a shared quantum and classical communication network.
Original languageEnglish
Article number140
JournalCommunications Physics
Volume2
Issue number1
Number of pages8
ISSN2399-3650
DOIs
Publication statusPublished - 2019

Cite this

@article{fc7197e6161443c39e68d823f366cd1a,
title = "Boosting the secret key rate in a shared quantum and classical fibre communication system",
abstract = "During the last 20 years, the advance of communication technologies has generated multiple exciting applications. However, classical cryptography, commonly adopted to secure current communication systems, can be jeopardised by the advent of quantum computers. Quantum key distribution (QKD) is a promising technology aiming to solve such a security problem. Unfortunately, current implementations of QKD systems show relatively low key rates, demand low channel noise and use ad hoc devices. In this work, we picture how to overcome the rate limitation by using a 37-core fibre to generate 2.86 Mbit s−1 per core that can be space multiplexed into the highest secret key rate of 105.7 Mbit s−1 to date. We also demonstrate, with off-the-shelf equipment, the robustness of the system by co-propagating a classical signal at 370 Gbit s− 1, paving the way for a shared quantum and classical communication network.",
author = "Davide Bacco and {da Lio}, Beatrice and Daniele Cozzolino and {Da Ros}, Francesco and Xueshi Guo and Yunhong Ding and Yusuke Sasaki and Kazuhiko Aikawa and Shigehito Miki and Hirotaka Terai and Taro Yamashita and Neergaard-Nielsen, {Jonas Schou} and Michael Galili and Karsten Rottwitt and Andersen, {Ulrik Lund} and Toshio Morioka and Oxenl{\o}we, {Leif Katsuo}",
year = "2019",
doi = "10.1038/s42005-019-0238-1",
language = "English",
volume = "2",
journal = "Communications Physics",
issn = "2399-3650",
publisher = "Nature",
number = "1",

}

TY - JOUR

T1 - Boosting the secret key rate in a shared quantum and classical fibre communication system

AU - Bacco, Davide

AU - da Lio, Beatrice

AU - Cozzolino, Daniele

AU - Da Ros, Francesco

AU - Guo, Xueshi

AU - Ding, Yunhong

AU - Sasaki, Yusuke

AU - Aikawa, Kazuhiko

AU - Miki, Shigehito

AU - Terai, Hirotaka

AU - Yamashita, Taro

AU - Neergaard-Nielsen, Jonas Schou

AU - Galili, Michael

AU - Rottwitt, Karsten

AU - Andersen, Ulrik Lund

AU - Morioka, Toshio

AU - Oxenløwe, Leif Katsuo

PY - 2019

Y1 - 2019

N2 - During the last 20 years, the advance of communication technologies has generated multiple exciting applications. However, classical cryptography, commonly adopted to secure current communication systems, can be jeopardised by the advent of quantum computers. Quantum key distribution (QKD) is a promising technology aiming to solve such a security problem. Unfortunately, current implementations of QKD systems show relatively low key rates, demand low channel noise and use ad hoc devices. In this work, we picture how to overcome the rate limitation by using a 37-core fibre to generate 2.86 Mbit s−1 per core that can be space multiplexed into the highest secret key rate of 105.7 Mbit s−1 to date. We also demonstrate, with off-the-shelf equipment, the robustness of the system by co-propagating a classical signal at 370 Gbit s− 1, paving the way for a shared quantum and classical communication network.

AB - During the last 20 years, the advance of communication technologies has generated multiple exciting applications. However, classical cryptography, commonly adopted to secure current communication systems, can be jeopardised by the advent of quantum computers. Quantum key distribution (QKD) is a promising technology aiming to solve such a security problem. Unfortunately, current implementations of QKD systems show relatively low key rates, demand low channel noise and use ad hoc devices. In this work, we picture how to overcome the rate limitation by using a 37-core fibre to generate 2.86 Mbit s−1 per core that can be space multiplexed into the highest secret key rate of 105.7 Mbit s−1 to date. We also demonstrate, with off-the-shelf equipment, the robustness of the system by co-propagating a classical signal at 370 Gbit s− 1, paving the way for a shared quantum and classical communication network.

U2 - 10.1038/s42005-019-0238-1

DO - 10.1038/s42005-019-0238-1

M3 - Journal article

VL - 2

JO - Communications Physics

JF - Communications Physics

SN - 2399-3650

IS - 1

M1 - 140

ER -