Entanglement between a stationary quantum system and a flying qubit is an essential
ingredient of a quantum-repeater network. It has been demonstrated for trapped ions …

Quantum correlations between long-lived quantum memories and telecom photons that can
propagate with low loss in optical fibers are an essential resource for the realization of large …

Long-lifetime quantum storages accessible to the telecom photonic infrastructure are
essential to long-distance quantum communication. Atomic quantum storages have …

Trapped atomic ions are ideal single photon emitters with long-lived internal states which
can be entangled with emitted photons. Coupling the ion to an optical cavity enables the …

The coherent manipulation of the frequency of single photons is an important requirement
for future quantum network technologies. It allows, for instance, quantum systems emitting in …

Wavelengths in the telecommunication window (approximately 1.25–1.65 μ m) are ideal for
quantum communication due to low transmission loss in fiber networks. To realize quantum …

Future quantum networks will require the ability to produce matter-photon entanglement at
photon frequencies not naturally emitted from the matter qubit. This allows for a hybrid …

Entanglement between light and matter combines the advantage of long distance
transmission of photonic qubits with the storage and processing capabilities of atomic qubits …

We demonstrate polarisation-preserving frequency conversion of single-photon-level light at
854 nm, resonant with a trapped-ion transition and qubit, to the 1550-nm telecom C band. A …

Future ground-based quantum information networks will likely use single photons
transmitted through optical fibers to entangle individual network nodes. To extend …