A quantum internet is the holy grail of quantum information processing, enabling the
deployment of a broad range of quantum technologies and protocols on a global scale …

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

Over the past few decades, significant progress has been made in quantum information
technology, from theoretical studies to experimental demonstrations. Revolutionary quantum …

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 …

Non-classical photon sources are a crucial resource for distributed quantum networks.
Photons generated from matter systems with memory capability are particularly promising …

Efficient synchronization of single photons that are compatible with narrow band atomic
transitions is an outstanding challenge, which could prove essential for photonic quantum …

The ability to create, manipulate and detect non-classical states of light has been key for
many recent achievements in quantum physics and for developing quantum technologies …

Establishing quantum entanglement between individual nodes is crucial for building large-
scale quantum networks, enabling secure quantum communications, distributed quantum …

Broadband quantum memory is critical to enabling the operation of emerging photonic
quantum technology at high speeds. Here we review a central challenge to achieving …

Quantum key distribution (QKD) would play an important role in future information
technologies due to its theoretically proven security based on the laws of quantum …