Photons have been a flagship system for studying quantum mechanics, advancing quantum
information science, and develo** quantum technologies. Quantum entanglement …

Quantum imaging is a multifaceted field of research that promises highly efficient imaging in
extreme spectral ranges as well as ultralow‐light microscopy. Since the first proof‐of …

Quantum metrology is one of the most promising applications of quantum technologies. The
aim of this research field is the estimation of unknown parameters exploiting quantum …

An outstanding goal in quantum optics and scalable photonic quantum technology is to
develop a source that each time emits one and only one entangled photon pair with …

Entangled photon pairs are a critical resource in quantum communication protocols ranging
from quantum key distribution to teleportation. The current workhorse technique for …

Single photon sources are key components for quantum technologies such as quantum
communication, computing and metrology. A key challenge towards the realization of global …

Transferring entangled states between photon pairs is essential in quantum communication.
Semiconductor quantum dots are the leading candidate for generating polarization …

Frequency encoding of quantum information together with fiber and integrated photonic
technologies can significantly reduce the complexity and resource requirements for realizing …

Distributed quantum information in networks is paramount for global secure quantum
communication. Moreover, it finds applications as a resource for relevant tasks, such as …

The polarization beam splitter is a key component for polarization manipulation in photonic
integrated circuits, but it is challenging to design for low-refractive-index optical materials …