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 …

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 …

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 …

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 …

Quantum correlation of two‐photon states is utilized to suppress the environmental noise in
imaging down to the single‐photon level. However, the size of the coherence area of the …

Although electrons and photons are the most widely researched elementary particles, their
interactions outside of the confines of a material are not yet fully explored. Here, we report …