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 …

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 …

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 …

Two processes of photon-pair creation can be arranged such that the paths of the emitted
photons are identical. The path information is thereby not erased but rather never born in the …

We review the main works in the field of nonlinear interferometers, which has been
develo** ever since the start of nonlinear optics and has seen growing interest in recent …

In previous years the possibility of creating and manipulating quantum states of light has
paved the way for the development of new technologies exploiting peculiar properties of …

Quantum sensing is highly attractive for accessing spectral regions in which the detection of
photons is technically challenging: Sample information is gained in the spectral region of …

Hyperspectral microscopy is an imaging technique that provides spectroscopic information
with high spatial resolution. When applied in the relevant wavelength region, such as in the …

Quantum superposition of high-dimensional states enables both computational speed-up
and security in cryptographic protocols. However, the exponential complexity of tomographic …