Linear accelerator-based free-electron lasers (FELs) are the leading source of fully coherent
X-rays with ultra-high peak powers and ultra-short pulse lengths. Current X-ray FEL facilities …

The Wigner function was formulated in 1932 by Eugene Paul Wigner, at a time when
quantum mechanics was in its infancy. In doing so, he brought phase space representations …

Following structural dynamics in real time is a fundamental goal towards a better
understanding of chemical reactions. Recording snapshots of individual molecules with …

X-ray free-electron lasers (XFELs) and table-top sources of x-rays based upon high
harmonic generation (HHG) have revolutionized the field of ultrafast x-ray atomic and …

X-ray free-electron lasers provide femtosecond-duration pulses of hard X-rays with a peak
brightness approximately one billion times greater than is available at synchrotron radiation …

We discuss how Coulomb explosion imaging (CEI), triggered by intense femtosecond laser
pulses and combined with laser-induced alignment and covariance analysis of the angular …

The ultrafast structural dynamics of water following inner-shell ionization is a crucial issue in
high-energy radiation chemistry. We have exposed isolated water molecules to a short x-ray …

X-ray free-electron lasers (XFELs) enable crystallographic structure determination beyond
the limitations imposed upon synchrotron measurements by radiation damage. The need for …

A thorough study of the performance of delta-coupled-cluster (ΔCC) methods for calculations
of core-ionization energies for elements of the first long row of the periodic table is reported …

Multi-electron dynamics in atoms and molecules very often occur on sub-to few-femtosecond
time scales. The available intensities of extreme-ultraviolet (XUV) attosecond pulses have …