Conventional nonlinear spectroscopy uses classical light to detect matter properties through
the variation of its response with frequencies or time delays. Quantum light opens up new …

Conspectus The application of quantum states of light such as entangled photons, for
example, created by parametric down conversion, has experienced tremendous progress in …

Photosynthesis is generally assumed to be initiated by a single photon,–from the Sun,
which, as a weak light source, delivers at most a few tens of photons per nanometre squared …

New free-electron laser and high-harmonic generation X-ray light sources are capable of
supplying pulses short and intense enough to perform resonant nonlinear time-resolved …

Entangled photons exhibit strong nonclassical frequency and time correlations
simultaneously, which allow them to excite and extract information about molecules in new …

We utilize quantum entangled photons to carry out nonlinear optical spectroscopy in organic
molecules with an extremely small number of photons. For the first time, fluorescence is …

Entangled photons exhibit non-classical light–matter interactions that create new
opportunities in materials and molecular science. Notably, in entangled two-photon …

This tutorial outlines the theory of nonlinear spectroscopy with quantum light, and in
particular with entangled photons. To this end, we briefly review molecular quantum …

Entangled photons provide an important tool for secure quantum communication, computing
and lithography. Low intensity requirements for multi-photon processes make them idealy …

The use of a nonclassical light source for studying molecular electronic structure has been of
great interest in many applications. Here we report a theoretical study of entangled two …