Semi-quantum key distribution describes a system in which a fully quantum user and
classical user perform key distribution. The main advantage of key distribution is its security …

Optical beaconing is an important part of the acquisition, pointing and tracking system
necessary for free-space quantum key distribution (QKD). However, uplink beacon back …

Quantum key distribution (QKD) protocols have unique advantages of enabling symmetric
key sharing with information-theoretic security (ITS) between remote locations, which ensure …

Global-scale quantum communication networks will require efficient long-distance
distribution of quantum signals. While optical fibre communications are range-limited due to …

Satellite and aerial platforms are critical in the deployment of global quantum
communications networks. Currently, there remain significant challenges including …

Quantum key distribution (QKD) is a quantum communications protocol which provides the
growth of encryption keys under guaranteed security. Due to the single-photon nature of …

Discrete-variable quantum key distribution (QKD) requires the use of highly sensitive single-
photon detectors (SPD) to detect decoded quantum states. These can form a significant …

Free-space optical communication links promise better security and increase bandwidths
but can suffer from noise in daylight. This is particularly detrimental in quantum …

This article presents an in-depth satellite-to-ground quantum key distribution (QKD)
feasibility analysis between a low Earth orbit (LEO) satellite and a 0.28-m small-sized optical …

We introduce an electro-optical arrangement that can produce time-bin encoded symbols
with the decoy state method over a standard optical fiber in the C-band telecom window. The …