An overview of both experimental and theoretical results in the field of resonant scattering of
tunable soft and hard x-ray radiation is presented, with a main focus on the closely related …

The perceived dichotomy between analytical and ab initio approaches to theory in
attosecond science is often seen as a source of tension and misconceptions. This Topical …

Oscillators are at the heart of optical lasers, providing stable, transform-limited pulses. Until
now, laser oscillators have been available only in the infrared to visible and near-ultraviolet …

K β x-ray emission spectroscopy is a powerful probe for electronic structure analysis of 3 d
transition metal systems and their ultrafast dynamics. Selectively enhancing specific spectral …

Intense x-ray and extreme ultraviolet (XUV) light sources have been available for decades,
however, due to weak nonlinear interaction in the XUV photon energy range, observation of …

Coherent nonlinear spectroscopies and imaging in the X-ray domain provide direct insight
into the coupled motions of electrons and nuclei with resolution on the electronic length …

Cavity‐enhanced superfluorescence (CESF) in quantum dot (QD) system is an ultrafast and
intense lasing generated by combination of quantum coupling effect and optically stimulated …

The exploration of cooperative states in many‐body systems is a key research area. It
focuses on superfluorescence (SF), a phenomenon linked with radiative dipole coupling …

Extreme-ultraviolet (XUV) sources including high-harmonic generation (HHG), free-electron
lasers (FELs), soft-X-ray lasers and laser-driven plasmas are widely used for applications …

We investigated the superfluorescent decay process of dense rubidium atomic vapor in a
cell. Using a femtosecond laser pulse, the atoms were excited from the 5 S ground state to …