Quantum key distribution (QKD) constitutes a symmetric secret key negotiation protocol
capable of maintaining information-theoretic security. Given the recent advances in QKD …

Quantum networks play an extremely important role in quantum information science, with
application to quantum communication, computation, metrology, and fundamental tests. One …

Discrete frequency modes, or bins, present a blend of opportunities and challenges for
photonic quantum information processing. Frequency-bin-encoded photons are readily …

Quantum secure direct communication (QSDC) based on entanglement can directly transmit
confidential information. However, the inability to simultaneously distinguish the four sets of …

Concerted efforts are underway to establish an infrastructure for a global quantum Internet to
realise a spectrum of quantum technologies. This will enable more precise sensors, secure …

Quantum key distribution (QKD) networks are promising to serve large numbers of users
with information-theoretic secure communication. In QKD networks, the detection-safe …

Quantum networks provide the framework for quantum communication, clock
synchronization, distributed quantum computing, and sensing. Implementing large-scale …

Optical photons are powerful carriers of quantum information, which can be delivered in free
space by satellites or in fibers on the ground over long distances. Entanglement of quantum …

The advanced notebooks, mobile phones, and Internet applications in today's world that we
use are all entrenched in classical communication bits of zeros and ones. Classical Internet …

Reliable long-distance distribution of entanglement is a key technique for many quantum
applications, most notably quantum key distribution. Here, we present a continuously …