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 cryptography exploits principles of quantum physics for the secure processing of
information. A prominent example is secure communication, ie, the task of transmitting …

Rapid development of supercomputers and the prospect of quantum computers are posing
increasingly serious threats to the security of communication. Using the principles of …

The twin-field (TF) quantum key distribution (QKD) protocol and its variants are highly
attractive because they can beat the well-known fundamental limit of the secret key rate for …

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 …

The peculiar properties of quantum mechanics allow two remote parties to communicate a
private, secret key, which is protected from eavesdrop** by the laws of physics 1, 2, 3, 4 …

Quantum cryptography Page 1 Quantum cryptography Nicolas Gisin, Grégoire Ribordy,
Wolfgang Tittel, and Hugo Zbinden Group of Applied Physics, University of Geneva, 1211 …

Quantum key distribution (QKD) is the first quantum information task to reach the level of
mature technology, already fit for commercialization. It aims at the creation of a secret key …

In information processing, as in physics, our classical world view provides an incomplete
approximation to an underlying quantum reality. Quantum effects like interference and …

This paper provides necessary and sufficient conditions for constructing a universal
quantum computer over continuous variables. As an example, it is shown how a universal …