Free-electron lasers and high-harmonic-generation table-top systems are new sources of
extreme-ultraviolet to hard X-ray photons, providing ultrashort pulses that are intense …

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

Nonadiabatic dynamics around an avoided crossing or a conical intersection play a crucial
role in the photoinduced processes of most polyatomic molecules. The present work shows …

In the Bohr model of the atom, the nominal orbiting period for a 1s electron in the hydrogen
atom is 150 as (1 as= 10− 18 s). Attosecond light pulses are thus in principle short enough to …

Sulfur-substituted nucleobases are DNA and RNA base derivatives that exhibit extremely
efficient photoinduced intersystem crossing (ISC) dynamics into the lowest-energy triplet …

The identification of the decay pathway of the nucleobase uracil after being photoexcited by
ultraviolet light has been a long-standing problem. Various theoretical models have been …

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

Tracing the evolution of molecular coherences can provide a direct, unambiguous probe of
nonadiabatic molecular processes, such as the passage through conical intersections of …

Linear off-resonant x-ray Raman techniques are capable of detecting the ultrafast electronic
coherences generated when a photoexcited wave packet passes through a conical …

We theoretically monitor the photoinduced ππ*→ n π* internal conversion process in 4-
thiouracil (4TU), triggered by an optical pump. The element-sensitive spectroscopic …