Recent progress in high power ultrafast short-wave and mid-wave infrared lasers has
enabled gas-phase high harmonic generation (HHG) in the water window and beyond, as …

In quantum systems, coherent superpositions of electronic states evolve on ultrafast time
scales (few femtoseconds to attoseconds; 1 attosecond= 0.001 femtoseconds= 10− 18 …

Controlling matter with light has always been a great challenge, leading to the ever-
expanding field of photochemistry. In addition, since the first generation of light pulses of …

This roadmap reviews the new, highly interdisciplinary research field studying the behavior
of condensed matter systems exposed to radiation. The Review highlights several recent …

We demonstrate long-lived electronic coherences in molecules using a combination of
measurements with shaped octave spanning ultrafast laser pulses and calculations of the …

The possibility of suddenly ionized molecules undergoing extremely fast electron hole (or
hole) dynamics prior to significant structural change was first recognized more than 20 years …

The ultrafast electronic charge dynamics in molecules upon photoionization while the
nuclear motions are frozen is known as charge migration. In a theoretical study of the …

The creation and dynamical fate of a coherent superposition of electronic states generated
in a polyatomic molecule by broadband ionization with extreme ultraviolet pulses is studied …

Modern ultrashort X-ray/XUV (extreme ultraviolet) sources provide unique opportunities to
investigate the primary reactions of matter upon energetic excitation. Understanding these …

Attosecond charge migration is a periodic evolution of the charge density at specific sites of
a molecule on a timescale defined by the energy intervals between the electronic states …