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 …

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 …

Abstract Hong–Ou–Mandel (HOM) interference—the bunching of indistinguishable photons
at a beamsplitter—is a staple of quantum optics and lies at the heart of many quantum …

Entangled quantum systems have properties that have fundamentally overthrown the
classical worldview. Increasing the complexity of entangled states by expanding their …

Holography is a cornerstone characterization and imaging technique that can be applied to
the full electromagnetic spectrum, from X-rays to radio waves or even particles such as …

The contrast of an image can be degraded by the presence of background light and sensor
noise. To overcome this degradation, quantum illumination protocols have been theorized …

Photonics has become a mature field of quantum information science, where integrated
optical circuits offer a way to scale the complexity of the set-up as well as the dimensionality …

Classical light sources emit a randomly-timed stream of individual photons, the spatial
distribution of which can be detected with a camera to form an image. Quantum light …

Spatial correlations between two photons are the key resource in realising many quantum
imaging schemes. Measurement of the bi-photon correlation map is typically performed …

As a tutorial to the spatial aspects of spontaneous parametric downconversion (SPDC), we
present a detailed first-principles derivation of the transverse correlation width of photon …