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 …

We present general guidelines for finding solid-state systems that could serve as coherent
electron-spin–photon interfaces even at relatively high temperatures, where phonons are …

With their shielded 4f orbitals, rare-earth ions (REIs) offer optical and electron spin
transitions with good coherence properties even when embedded in a host crystal matrix …

Lanthanide-based spin qubits are intriguing candidates for high-fidelity quantum memories
owing to their spin-optical interfaces. Metal− organic frameworks (MOFs) offer promising …

Abstract Yttrium orthosilicate (Y 2 SiO 5-YSO) is one of the most promising crystals to host
rare-earth (RE) ions for quantum technologies applications. In this matrix, they indeed …

We describe principles of operation of a quantum repeater, ie, a device designed to
distribute entangled states of quantum systems over long distances. A review is presented of …

Dispersed impurities in diamond present a flourishing platform for research in quantum
informatics, spintronics and single phonon emitters. Based on the vast pool of experimental …

Antiresonant hollow-core fibers are a novel type of optical fiber with unparalleled
characteristics, unattainable with solid-core fibers. In particular, antiresonant hollow-core …

Solid-state spin systems hold great promise for quantum information processing and the
construction of quantum networks. However, the considerable inhomogeneity of spins in …

Optically active solid-state spin qubits thrive as an appealing technology for quantum
interconnect and quantum networking, owing to their atomic size, scalable creation, long …