Rare Earth (RE) ion doped nanomaterials are promising candidates for a range of quantum
technology applications. Among RE ions, the so-called Kramers' ions possess spin …

We review concepts and recent work related to creating light-matter interfaces for future
quantum networks based on rare-earth ion-doped crystals. More precisely, we explore their …

We present a quantum repeater protocol for distributing entanglement over long distances,
where each repeater node contains several qubits that can couple to one single-photon …

We develop a model in which presence of entanglement in a quantum system can be
confirmed through coarse observations of the environment surrounding the system. This …

This thesis describes the work done on two open access microcavities that aims at detecting
single rare-earth ions for quantum information applications. The initial microcavity faced …

Solid materials doped with rare-earth ions are considered an attractive platform for quantum
information applications. One of the main reasons for this is the exceptionally long optical …