Photonic quantum technologies promise a revolution of the world of information processing,
from simulation and computing to communication and sensing, thanks to the many …

Integration of superconducting nanowire single-photon detectors with nanophotonic
waveguides is a key technological step that enables a broad range of classical and quantum …

The standard primitives of quantum computing include deterministic unitary entangling
gates, which are not natural operations in many systems including photonics. Here, we …

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 …

Nearly 30 years ago, two-photon interference was observed, marking the beginning of a
new quantum era. Indeed, two-photon interference has no classical analogue, giving it a …

The robust generation and propagation of multiphoton quantum states are crucial for
applications in quantum information, computing, and communications. Although photons are …

We give new evidence that quantum computers--moreover, rudimentary quantum computers
built entirely out of linear-optical elements--cannot be efficiently simulated by classical …

In this review we present some of the recent advances in the field of silicon nitride photonic
integrated circuits. The review focuses on the material deposition techniques currently …

The ability to manipulate quantum states of light by integrated devices may open new
perspectives both for fundamental tests of quantum mechanics and for novel technological …

On-chip integration of quantum optical systems could be a major factor enabling photonic
quantum technologies. Unlike the case of electronics, where the essential device is the …