Quantum key distribution (QKD) aims to generate secure private keys shared by two remote
parties. With its security being protected by principles of quantum mechanics, some …

Secure key rate (SKR) of point-point quantum key distribution (QKD) is fundamentally
bounded by the rate-loss limit. Recent breakthrough of twin-field (TF) QKD can overcome …

The basic principle of quantum mechanics guarantees the unconditional security of quantum
key distribution (QKD),,,–at the cost of forbidding the amplification of a quantum state. As a …

This book provides the reader with the mathematical framework required to fully explore the
potential of small quantum information processing devices. As decoherence will continue to …

Quantum key distribution endows people with information-theoretical security in
communications. Twin-field quantum key distribution (TF-QKD) has attracted considerable …

Quantum cryptography promises levels of security that are impossible to attain in a classical
world. Can this security be guaranteed to classical users of a quantum protocol, who may …

Twin-field quantum key distribution (TFQKD) promises ultralong secure key distribution
which surpasses the rate distance limit and can reduce the number of the trusted nodes in …

Quantum key distribution promises unconditionally secure communications. However, as
practical devices tend to deviate from their specifications, the security of some practical …

Due to its ability to tolerate high channel loss, decoy-state quantum key distribution (QKD)
has been one of the main focuses within the QKD community. Notably, several experimental …

A bstract We show that a naïve application of the quantum extremal surface (QES)
prescription can lead to paradoxical results and must be corrected at leading order. The …