Over the last 20 years, XUV and X-ray free-electron lasers have enabled a wide variety of
time-resolved experiments that have dramatically advanced our understanding of ultrafast …

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

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

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 …

Highlights•The fluorescence of Carbon Dots (CDs) was specifically turned on as the
viscosity of solvents increased.•Fluctuation of mitochondrial membrane potential was …

We investigate the use of orbital-optimized references in conjunction with single-reference
coupled-cluster theory with single and double substitutions (CCSD) for the study of core …

Attosecond time-resolved electron tunneling dynamics have been investigated by using
attosecond angular streaking spectroscopy, where a clock reference to the laser field vector …

The detailed understanding of electronic coherence in quantum systems requires
measurements on the attosecond timescale. Attosecond x-ray pulses enable the study of …

We present a theoretical investigation of the near-edge X-ray absorption fine structure and
the Auger–Meitner decay spectra of ethylene and its cation. Herein, we demonstrate that our …

Our understanding of how photons couple to different degrees of freedom in solids forms the
bedrock of ultrafast physics and materials sciences. In this review, the emergent ultrafast …