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 …

Structured waves are ubiquitous for all areas of wave physics, both classical and quantum,
where the wavefields are inhomogeneous and cannot be approximated by a single plane …

Structured light has become topical of late, where controlling light in all its degrees of
freedom has offered novel states of light long predicted, enhanced functionality in …

Entanglement is a quintessential quantum mechanical phenomenon with no classical
equivalent. First discussed by Einstein, Podolsky, and Rosen and formally introduced by …

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 …

Measurements of photon temporal correlations have been the mainstay of experiments in
quantum optics. Over the past several decades, advancements in detector technologies …

A typical imaging scenario requires three basic ingredients:(1) a light source that emits light,
which in turn interacts and scatters off the object of interest;(2) detection of the light being …

Single-pixel quantum ghost imaging involves the exploitation of non-local photon spatial
correlations to image objects with light that has not interacted with them and, using …

We give a protocol for ghost imaging in a way that is always counterfactual—while imaging
an object, no light interacts with that object. This extends the idea of counterfactuality beyond …