We argue that long optical storage times are required to establish entanglement at high
rates over large distances using memory-based quantum repeaters. Triggered by this …

We report an observation of the linear Stark effect in a Tm 3+: Y 3 Al 5 O 12 crystal with the
distribution of the Stark coefficient over the ion ensemble. We associate this effect with local …

Quantum computers based on rare-earth-ion-doped crystals show promising properties in
terms of scalability and connectivity if single ions can be used as qubits. Through …

Efficient and reversible optical to microwave transducers are required for entanglement
transfer between superconducting qubits and light in quantum networks. Rare-earth-doped …

We derive the area theorem for light pulses interacting with an inhomogeneously broadened
ensemble of two-level atoms in a single-mode optical waveguide and present its analytical …

We characterize the 795 nm H 3 6 to H 3 4 transition of Tm 3+ in a Ti 4+: Li Nb O 3
waveguide at temperatures as low as 800 mK. Coherence and hyperfine population …

We investigate the relevant spectroscopic properties of the 795 nm H 6 3↔ H 4 3 transition
in 1% Tm 3+∶ Y 3 Ga 5 O 12 at temperatures as low as 1.2 K for optical quantum memories …

Neutral shallow donors in zinc oxide (ZnO) are spin qubits with optical access via the donor-
bound exciton. This spin–photon interface enables applications in quantum networking …

We study the bandwidth and multiplexing capacity of an erbium-doped optical memory for
quantum storage purposes. We concentrate on the protocol revival of a silenced echo …

It was recently shown that the optical excitation of rare-earth ions produces a local change of
the host matrix shape, attributed to a change of the rare-earth ion's electronic orbital …