The scale-up of quantum hardware is fundamental to realize the full potential of quantum
technology. Among a plethora of hardware platforms, photonics stands out: it provides a …

Quantum cryptography is arguably the fastest growing area in quantum information science.
Novel theoretical protocols are designed on a regular basis, security proofs are constantly …

In principle, quantum key distribution (QKD) offers information-theoretic security based on
the laws of physics. In practice, however, the imperfections of realistic devices might …

The security of quantum key distribution (QKD) usually relies on that the users' devices are
well characterized according to the security models made in the security proofs. In contrast …

The superconducting nanowire single-photon detector (SNSPD) is a quantum-limit
superconducting optical detector based on the Cooper-pair breaking effect by a single …

Superconducting nanowire single-photon detector (SNSPD) with near-unity system
efficiency is a key enabling, but still elusive, technology for numerous quantum fundamental …

Communication security has to evolve to a higher plane in the face of the threat from the
massive computing power of the emerging quantum computers. Quantum secure direct …

Quantum key distribution provides secure keys with information-theoretic security ensured
by the principle of quantum mechanics. The continuous-variable version of quantum key …

Device-independent quantum key distribution (DI-QKD) is often seen as the ultimate key
exchange protocol in terms of security, as it can be performed securely with uncharacterised …

The ability to produce random numbers that are unknown to any outside party is crucial for
many applications. Device-independent randomness generation,,–does not require trusted …