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 …

Abstract Space-like separation of entangled quantum states is a central concept in
fundamental investigations of quantum mechanics and in quantum communication …

Long-duration quantum memories for photonic qubits are essential components for
achieving long-distance quantum networks and repeaters. The mapping of optical states …

One goal of the second quantum revolution is developing an approach to transmit coherent
quantum information across the world, forming the basis of the quantum Internet. Achieving …

A future quantum network will consist of quantum processors that are connected by quantum
channels, just like conventional computers are wired up to form the Internet. In contrast to …

Optical quantum memory is an essential element for long-distance quantum communication
and photonic quantum computation protocols. The practical implementation of such …

Quantum networks provide a prospective paradigm to connect separated quantum nodes,
which relies on the distribution of long-distance entanglement and active feedforward control …

Long-lived quantum memories are essential components of a long-standing goal of remote
distribution of entanglement in quantum networks. These can be realized by storing the …

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 …