Modern imaging technologies are widely based on classical principles of light or
electromagnetic wave propagation. They can be remarkably sophisticated, with recent …

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 …

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 …

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 …

Quantum metrology can achieve enhanced sensitivity for estimating unknown parameters
beyond the standard quantum limit. Recently, multiple-phase estimation exploiting quantum …

Optical metrology is a well-established subject, dating back to early interferometry
techniques utilizing light's linear momentum through fringes. In recent years, significant …

Quadratic light-matter interactions are nonlinear couplings such that quantum emitters
interact with photonic or phononic modes exclusively via the exchange of excitation pairs …

Abstract Hong-Ou-Mandel interference, the fact that identical photons that arrive
simultaneously on different input ports of a beam splitter bunch into a common output port …

Quantum metrology protocols are typically designed around the assumption that we have an
abundance of measurement data, but recent practical applications are increasingly driving …

Interference, which refers to the phenomenon associated with the superposition of waves,
has played a crucial role in the advancement of physics and finds a wide range of …