Worldwide, enormous efforts are directed toward the development of the so‐called quantum
internet. Turning this long‐sought‐after dream into reality is a great challenge that will …

The long dreamed 'quantum internet'would consist of a network of quantum nodes (solid-
state or atomic systems) linked by flying qubits, naturally based on photons, travelling over …

Quantum key distribution—exchanging a random secret key relying on a quantum
mechanical resource—is the core feature of secure quantum networks. Entanglement-based …

Quantum dots are both excellent single-photon sources and hosts for single spins. This
combination enables the deterministic generation of Raman-photons—bandwidth-matched …

Semiconductor quantum dots are capable of emitting polarization entangled photon pairs
with ultralow multipair emission probability even at maximum brightness. Using a quantum …

Many quantum photonic technologies require the efficient generation of entangled pairs of
photons, but to date there have been few ways to produce them reliably. Sources based on …

Interfaced single-photon sources and quantum memories for photons together form a
foundational component of quantum technology. Achieving compatibility between …

Epitaxial quantum dots formed by III–V compound semiconductors are excellent sources of
non-classical photons, creating single photons and entangled multi-photon states on …

Photonic entanglement swap**, the procedure of entangling photons without any direct
interaction, is a fundamental test of quantum mechanics and an essential resource to the …

Photonic quantum technologies are on the verge of finding applications in everyday life with
quantum cryptography and quantum simulators on the horizon. Extensive research has …