A quantum key distribution (QKD) network is proposed to allow QKD protocols to be the
infrastructure of the Internet for distributing unconditional security keys instead of existing …

We present an entanglement purification protocol and an entanglement concentration
protocol for electron-spin entangled states, resorting to quantum-dot spin and optical …

We present an efficient quantum repeater protocol that uses coupled systems of quantum-
dot spins and optical microcavities, in which the spatial entanglement of a photon system …

Based on EPR pairs, this paper proposes a different quantum private comparison (QPC)
protocol enabling two parties to compare the equality of their information without revealing …

Quantum secure direct communication is the direct communication of secret messages
without need for establishing a shared secret key first. In the existing schemes, quantum …

A combined study of Raman scattering, IR absorption, photoluminescence, and
photoconductivity was performed in ZnO. Two shallow donors—hydrogen at the bond …

Hyperentanglement is a promising resource in quantum information processing, especially
for increasing the channel capacity of long-distance quantum communication …

This study proposes the first high-capacity quantum secure direct communication (QSDC)
with two-photon six-qubit hyper-entangled Bell states in two longitudinal momentum and …

A two-step quantum secure direct dialogue protocol using Einstein-Podolsky-Rosen (EPR)
pair block is proposed. In the protocol, the dialogue messages are encoded on series of …

This study presents the first authenticated semi-quantum key distribution (ASQKD) protocols
without using authenticated classical channels. By pre-sharing a master secret key between …