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 …

Owing to the inevitable loss in communication channels, the distance of entanglement
distribution is limited to approximately 100 kilometres on the ground. Quantum repeaters can …

Worldwide, enormous efforts are directed toward the development of the so‐called quantum
internet. Turning this long‐sought‐after dream into reality is a great challenge that will …

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 …

Quantum light–matter interfaces are at the heart of photonic quantum technologies.
Quantum memories for photons, where non-classical states of photons are mapped onto …

Optical quantum memories are essential elements in quantum networks for long-distance
distribution of quantum entanglement. Scalable development of quantum network nodes …

Extensive efforts have been expended in developing hybrid quantum systems to overcome
the short coherence time of superconducting circuits by introducing the naturally long-lived …

Optical communication channels have redefined the scope and applications of classical
computing; similarly, photonic transfer of quantum information promises to open new …

Rare-earth dopants are arguably one of the most studied optical centers in solids, with
applications spanning from laser optoelectronics, biosensing, lighting to displays …