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 …

Bell's theorem proves that quantum theory is inconsistent with local physical models. It has
propelled research in the foundations of quantum theory and quantum information science …

Semidefinite programs are convex optimisation problems involving a linear objective
function and a domain of positive semidefinite matrices. Over the last two decades, they …

The goal of quantum key distribution (QKD) is to establish a secure key between two parties
connected by an insecure quantum channel. To use a QKD protocol in practice, one has to …

In theory, quantum key distribution (QKD) offers information-theoretic security. In practice,
however, it does not due to the discrepancies between the assumptions used in the security …

Quantum random access codes (QRACs) are key tools for a variety of protocols in quantum
information theory. These are commonly studied in prepare-and-measure scenarios in …

Semi-device independent (Semi-DI) quantum random number generators (QRNGs) gained
attention for security applications, offering an excellent trade-off between security and …

The Bennett-Brassard 1984 (BB84) protocol is the most widely implemented quantum key
distribution (QKD) scheme. However, despite enormous theoretical and experimental efforts …

Quantum channels breaking entanglement, incompatibility, or nonlocality are defined as
such because they are not useful for entanglement-based, one-sided device-independent …

Quantum random number generators (QRNGs) are able to generate numbers that are
certifiably random, even to an agent who holds some side information. Such systems …