There has been a resurgence of interest in optical computing since the early 2010s, both in
academia and in industry, with much of the excitement centred around special-purpose …

Quantum cryptography is arguably the fastest growing area in quantum information science.
Novel theoretical protocols are designed on a regular basis, security proofs are constantly …

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 …

The production of pairs of entangled photons simply by focusing a laser beam onto a crystal
with a nonlinear optical response was used to test quantum mechanics and to open new …

Measurement-based quantum computation offers exponential computational speed-up
through simple measurements on a large entangled cluster state. We propose and …

Unconventional, special-purpose machines may aid in accelerating the solution of some of
the hardest problems in computing, such as large-scale combinatorial optimizations, by …

Quantum entanglement is a key resource in currently developed quantum technologies.
Sharing this fragile property between superconducting microwave circuits and optical or …

Materials with strong second-order (χ^(2)) optical nonlinearity, especially lithium niobate,
play a critical role in building optical parametric oscillators (OPOs). However, chip-scale …

Free electron beams such as those employed in electron microscopes have evolved into
powerful tools to investigate photonic nanostructures with an unrivaled combination of …

The quantum noise of light, attributed to the random arrival time of photons from a coherent
light source, fundamentally limits optical phase sensors. An engineered source of squeezed …