Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Conference on Lasers and Electro-Optics

1 GBaud Heterodyne Continuous Variable Quantum Key Distribution over 26 km Fiber

Max Rückmann, Christian G. Schaeffer

Published Jan 1, 2019• 4 citations
Publisher

Abstract

We experimentally demonstrate a 1 GBaud heterodyne continuous variable quantum key distribution system based on standard telecom components capable to achieve a key rate of 1.71 Mbit/s over 26 km of fiber.
DOI
10.1364/cleo_qels.2019.fth4a.4

Related papers

1 GBaud Heterodyne Continuous Variable Quantum Key Distribution over 26 km Fiber

Max Rückmann, Christian Schaeffer

We experimentally demonstrate a 1 GBaud heterodyne continuous variable quantum key distribution system based on standard telecom components capable to achieve a key rate of 1.71 Mbit/s over 26 km of fiber. © 2019 The Author(s)

Conference on Lasers and Electro-Optics•May 5, 2019•2 citations

538 Mb/s Integrated Continuous-Variable Quantum Key Distribution System

Axl Bomhals, Adnan A. E. Hajomer, Cédric Bruynsteen +7 more

We demonstrate a spectrally efficient 10 GBaud continuous-variable quantum key distribution (CVQKD) system with fully photonic-integrated transmitter and receiver, achieving a high asymptotic secret key rate of 538 Mb/s over a 10 km fiber link.

Optical Fiber Communication Conference•Jan 1, 2026•0 citations

High-performance long-distance discrete-modulation continuous-variable quantum key distribution

Yan Feng Tian, Yu Zhang, Shuaishuai Liu +4 more

We experimentally demonstrate a high-rate discretely modulated continuous-variable quantum key distribution over 80-km standard single-mode fiber with a 2.5 Gbaud, 16-symbol, two-ring constellation. With the help of well-designed digital signal processing algorithms, the excess noise of the system can be effectively suppressed. The achieved secret key rates are 49.02 Mbits/s, 11.86 Mbits/s, and 2.11 Mbits/s over 25-km, 50-km, and 80-km optical fiber, respectively, and achieve 67.4%, 70.0%, and 66.5% of the secret key rate performance of a Gaussian-modulated protocol. Our work shows that it is feasible to build a high-performance, long-distance continuous-variable quantum key distribution system with only a small constellation size.

Optics Letters•Apr 27, 2023•58 citations

Experimental demonstration of continuous-variable quantum key distribution over 80 km of standard telecom fiber

Paul Jouguet, Sébastien Kunz-Jacques, Anthony Leverrier +2 more

Continuous-variable quantum key distribution (CVQKD) [1] is a promising alternative to commonly used discrete-variable QKD protocols, because this technology can be implemented with standard telecom components and recent results suggest that it will be compatible with standard wavelength division multiplexed telecommunication networks [2]. Security proofs against general eavesdropping attacks are available for CVQKD protocols using Gaussian modulation [3], and field implementations over deployed telecommunication networks have been demonstrated over the past few years [4].

•Jan 1, 2013•3 citations

Long-Distance Continuous-Variable Quantum Key Distribution over 202.81 km of Fiber

Yichen Zhang, Ziyang Chen, Stefano Pirandola +7 more

Quantum key distribution provides secure keys resistant to code-breaking quantum computers. The continuous-variable version of quantum key distribution offers the advantages of higher secret key rates in metropolitan areas, as well as the use of standard telecom components that can operate at room temperature. However, the transmission distance of these systems (compared with discrete-variable systems) are currently limited and considered unsuitable for long-distance distribution. Herein, we report the experimental results of long distance continuous-variable quantum key distribution over 202.81 km of ultralow-loss optical fiber by suitably controlling the excess noise and employing highly efficient reconciliation procedures. This record-breaking implementation of the continuous-variable quantum key distribution doubles the previous distance record and shows the road for long-distance and large-scale secure quantum key distribution using room-temperature standard telecom components.

arXiv:2001.02555•Physical Review Letters•Jun 30, 2020•429 citations

One-way continuous-variable quantum key distribution over 5km of standard telecom fiber

Leilei Huang, Bing Qi, Li Qian +1 more

We report the first experimental demonstration of one-way Gaussian-modulated coherent state quantum key distribution system over kilometers of standard telecom fiber. Under realistic assumptions, the achievable secrete key rate is over 10kb/s.

Quantum Electronics and Laser Science Conference•May 1, 2007•0 citations
We experimentally demonstrate a high-rate discretely modulated continuous-variable quantum key distribution over 80-km standard single-mode fiber with a 2.5 Gbaud, 16-symbol, two-ring constellation. With the help of well-designed digital signal processing algorithms, the excess noise of the system can be effectively suppressed. The achieved secret key rates are 49.02 Mbits/s, 11.86 Mbits/s, and 2.11 Mbits/s over 25-km, 50-km, and 80-km optical fiber, respectively, and achieve 67.4%, 70.0%, and 66.5% of the secret key rate performance of a Gaussian-modulated protocol. Our work shows that it is feasible to build a high-performance, long-distance continuous-variable quantum key distribution system with only a small constellation size.
Continuous-variable quantum key distribution (CVQKD) [1] is a promising alternative to commonly used discrete-variable QKD protocols, because this technology can be implemented with standard telecom components and recent results suggest that it will be compatible with standard wavelength division multiplexed telecommunication networks [2]. Security proofs against general eavesdropping attacks are available for CVQKD protocols using Gaussian modulation [3], and field implementations over deployed telecommunication networks have been demonstrated over the past few years [4].
Quantum key distribution provides secure keys resistant to code-breaking quantum computers. The continuous-variable version of quantum key distribution offers the advantages of higher secret key rates in metropolitan areas, as well as the use of standard telecom components that can operate at room temperature. However, the transmission distance of these systems (compared with discrete-variable systems) are currently limited and considered unsuitable for long-distance distribution. Herein, we report the experimental results of long distance continuous-variable quantum key distribution over 202.81 km of ultralow-loss optical fiber by suitably controlling the excess noise and employing highly efficient reconciliation procedures. This record-breaking implementation of the continuous-variable quantum key distribution doubles the previous distance record and shows the road for long-distance and large-scale secure quantum key distribution using room-temperature standard telecom components.