Three decades ago, a highly nonlinear nonpertubative phenomenon, now well-known as
the high harmonic generation (HHG), was discovered when intense laser irradiates gaseous …

In extreme ultraviolet spectroscopy, the photoionization process occurring in a molecule due
to the absorption of a single photon can trigger an ultrafast nuclear motion in the cation …

Understanding the relaxation pathways of photoexcited molecules is essential to gain
atomistic-level insight into photochemistry. We performed a time-resolved study of ultrafast …

The ultrafast structural, Jahn–Teller (JT) driven, electronic coherence mediated quantum
dynamics in the CH4+ and CD4+ cations that follows sudden ionization using an XUV …

Abstract The Jahn-Teller effect is an essential mechanism of spontaneous symmetry
breaking in molecular and solid state systems, and has far-reaching consequences in many …

We report on fully quantum electronic-nuclear dynamics following sudden ionization from
the neutral in the three lowest electronic states of the CH4+ and CD4+ cations. There is a …

We derive expansion formulas up to arbitrary order in vibrational coordinates for the
tetrahedral and octahedral vibronic Hamiltonians that involve T and E states, and t and e …

An ab initio molecular orbital study has been performed to explore the structural
rearrangement and dissociation of SiH 4+ radical cation at the X ̃ 2 T 2 ground electronic …

The Jahn–Teller effect (JTE) is central to the understanding of the physical and chemical
properties of a broad variety of molecules and materials. Whereas the manifestations of the …

We present derivation and implementation of the multiconfigurational strong-field
approximation with Gaussian nuclear wave packets (MC-SFA-GWP)—a version of the …