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

Quantum 2.0 Conference and Exhibition

High-Dimensional Quantum Key Distribution with Scrambled Time-Bin Encoding

Kfir Sulimany, Rom Dudkiewicz, S. É. Korenblit, H. S. Eisenberg, Yaron Bromberg, Michael Ben-Or

Published Jan 1, 2022• 1 citation
Publisher

Abstract

We propose and analyze a high-dimensional cryptographic protocol relying on a coherent-one-way quantum key distribution system. We demonstrate it over a 40km fiber link and observe a twofold enhancement in the secure key rate.
DOI
10.1364/quantum.2022.qm3b.7

Related papers

Scrambled Time-Bin Encoding for Efficient High-Dimensional Quantum Key Distribution

Kfir Sulimany, Rom Dudkiewicz, S. É. Korenblit +3 more

We propose analyze and demonstrate a novel high-dimensional quantum key distribution protocol. We implement the protocol using a software update in a standard two-dimensional system and observe a twofold enhancement in the secure key rate.

Conference on Lasers and Electro-Optics•Jan 1, 2022•2 citations

High-dimensional coherent one-way quantum key distribution

Kfir Sulimany, Guy Pelc, Rom Dudkiewicz +4 more

Abstract High-dimensional quantum key distribution (QKD) offers secure communication with key rates that surpass those of QKD protocols utilizing two-dimensional encoding. However, existing high-dimensional QKD protocols require additional experimental resources, such as multiport interferometers and multiple detectors, thereby increasing the cost of high-dimensional systems and limiting their use. We introduce and analyze a high-dimensional QKD protocol that requires only standard two-dimensional hardware. We provide security analysis against individual and coherent attacks, establishing upper and lower bounds on the secure key rates. We tested our protocol on a standard two-dimensional QKD system over a 40 km fiber link, achieving a twofold increase in secure key rate compared to the standard two-dimensional coherent one-way protocol, without any hardware modifications. This work offers a significant improvement in the performance of already deployed QKD systems through simple software updates and holds broad applicability across various QKD schemes, making high-dimensional QKD practical for widespread use.

arXiv:2105.04733•npj Quantum Information•Jan 28, 2025•23 citations

Fast and Simple One-Way High-Dimensional Quantum Key Distribution

Kfir Sulimany, Rom Dudkiewicz, S. É. Korenblit +3 more

We propose and analyze a novel high-dimensional quantum key distribution protocol. We implement the protocol using a software update in a standard two-dimensional system and observe a twofold enhancement in the secure key rate.

Frontiers in Optics•Jan 1, 2021•3 citations

Secure High Dimensional Quantum Key Distribution Based on Wavelength-Multiplexed Time-Bin Encoding

Xiang Cheng, Murat Can Sarihan, Kai-Chi Chang +3 more

We experimentally demonstrated high-dimensional quantum key distribution with wavelength-multiplexed time-bin encoding, with photon information efficiency up to 4.082 secure-key bits/photon and secure-key rate up to 237-kbit/s. Security will be verified with dual-basis Franson interferometers.

Conference on Lasers and Electro-Optics•Jan 1, 2021•8 citations

Efficient Time-Bin Encoding for Practical High-Dimensional Quantum Key Distribution

Ilaria Vagniluca, Beatrice Da Lio, Davide Rusca +6 more

High-dimensional quantum key distribution (QKD) allows achievement of information-theoretic secure communications, providing high key-generation rates, which cannot, in principle, be obtained by QKD protocols with binary encoding. Nonetheless, the amount of experimental resources needed increases as the quantum states to be detected belong to a larger Hilbert space, thus raising the costs of practical high-dimensional systems. Here, we present an alternative scheme for fiber-based four-dimensional QKD, with time and phase encoding and one-decoy state technique. Quantum state transmission is tested over different channel lengths up to 145 km of standard single-mode fiber, evaluating the enhancement of the secret key rate in comparison to the three-state two-dimensional BB84 protocol, which is tested with the same experimental setup. Our scheme allows measurement of the four-dimensional states with a simplified and compact receiver, where only two single-photon detectors are necessary, thus making it a cost-effective solution for practical and fiber-based QKD.

arXiv:2004.03498•Physical Review Applied•Jul 17, 2020•114 citations

High Dimensional Quantum Key Distribution with Biphoton Frequency Combs through Energy-Time Entanglement

Murat Can Sarihan, Kai-Chi Chang, Xiang Cheng +7 more

Biphoton frequency combs offer a photon-efficient way to achieve a very high-rate quantum key distribution by utilizing both time and frequency-bin encoding, while offering theoretically proven unconditional security.

Conference on Lasers and Electro-Optics•Jan 1, 2019•5 citations
Abstract High-dimensional quantum key distribution (QKD) offers secure communication with key rates that surpass those of QKD protocols utilizing two-dimensional encoding. However, existing high-dimensional QKD protocols require additional experimental resources, such as multiport interferometers and multiple detectors, thereby increasing the cost of high-dimensional systems and limiting their use. We introduce and analyze a high-dimensional QKD protocol that requires only standard two-dimensional hardware. We provide security analysis against individual and coherent attacks, establishing upper and lower bounds on the secure key rates. We tested our protocol on a standard two-dimensional QKD system over a 40 km fiber link, achieving a twofold increase in secure key rate compared to the standard two-dimensional coherent one-way protocol, without any hardware modifications. This work offers a significant improvement in the performance of already deployed QKD systems through simple software updates and holds broad applicability across various QKD schemes, making high-dimensional QKD practical for widespread use.
High-dimensional quantum key distribution (QKD) allows achievement of information-theoretic secure communications, providing high key-generation rates, which cannot, in principle, be obtained by QKD protocols with binary encoding. Nonetheless, the amount of experimental resources needed increases as the quantum states to be detected belong to a larger Hilbert space, thus raising the costs of practical high-dimensional systems. Here, we present an alternative scheme for fiber-based four-dimensional QKD, with time and phase encoding and one-decoy state technique. Quantum state transmission is tested over different channel lengths up to 145 km of standard single-mode fiber, evaluating the enhancement of the secret key rate in comparison to the three-state two-dimensional BB84 protocol, which is tested with the same experimental setup. Our scheme allows measurement of the four-dimensional states with a simplified and compact receiver, where only two single-photon detectors are necessary, thus making it a cost-effective solution for practical and fiber-based QKD.