Major advances in X-ray sources including the development of circularly polarized and
orbital angular momentum pulses make it possible to probe matter chirality at …

Crossings of electronic potential energy surfaces in nuclear configuration space, known as
conical intersections, determine the rates and outcomes of a large class of photochemical …

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

Computational spectroscopy is becoming a mandatory tool for the interpretation of the
complex, and often congested, spectral maps delivered by modern non-linear multi-pulse …

Elementary events that determine photochemical outcomes and molecular functionalities
happen on the femtosecond and subfemtosecond timescales. Among the most ubiquitous …

Ultrafast time-resolved X-ray scattering, made possible by free-electron laser sources,
provides a wealth of information about electronic and nuclear dynamical processes in …

The current flux density is a vector field that can be used to describe theoretically how
electrons flow in a system out of equilibrium. In this work, we unequivocally demonstrate that …

We examine time-resolved X-ray diffraction from molecules in the gas phase which undergo
nonadiabatic avoided-crossing dynamics involving strongly coupled electrons and nuclei …

X-ray diffraction from molecules in the ground state produces an image of their charge
density, and time-resolved x-ray diffraction can thus monitor the motion of the nuclei …

Understanding conical intersection (CI) dynamics and subsequent conformational changes
is key for exploring and controlling photo-reactions in aromatic molecules. Monitoring of their …