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 …

Photons have been a flagship system for studying quantum mechanics, advancing quantum
information science, and develo** quantum technologies. Quantum entanglement …

Cryptographic key exchange protocols traditionally rely on computational conjectures such
as the hardness of prime factorization to provide security against eavesdrop** attacks …

Abstract Noisy Intermediate-Scale Quantum (NISQ) technology will be available in the near
future. Quantum computers with 50-100 qubits may be able to perform tasks which surpass …

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 …

Superconducting circuits are a strong contender for realizing quantum computing systems
and are also successfully used to study quantum optics and hybrid quantum systems …

Randomness is important for many information processing applications, including numerical
modelling and cryptography,. Device-independent quantum random-number generation …

Random numbers are central to cryptography and various other tasks. The intrinsic
probabilistic nature of quantum mechanics has allowed us to construct a large number of …

We consider a new model for the testing of untrusted quantum devices, consisting of a single
polynomial time bounded quantum device interacting with a classical polynomial time …

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 …