The perceived dichotomy between analytical and ab initio approaches to theory in
attosecond science is often seen as a source of tension and misconceptions. This Topical …

Attosecond photoionization time delays reveal information about the potential energy
landscape that an outgoing electron wavepacket probes upon ionization. In this study, we …

We present a numerical study of the resonant high-harmonic generation by tin ions in an
elliptically polarized laser field along with a simple analytical model revealing the …

We propose an attosecond extreme ultraviolet pump IR-probe photoionization protocol that
employs pairs of counterrotating consecutive harmonics and angularly resolved …

Recent experiments [D. Pengel, S. Kerbstadt, L. Englert, T. Bayer, and M. Wollenhaupt,
Phys. Rev. A 96 043426 (2017) 10.1103/PhysRevA. 96.043426] have measured the …

As a step toward the full ab initio description of two-photon double ionization processes, we
present a finite-pulse version of the virtual-sequential model for polyelectronic atoms. The …

Realistic attosecond wave packets have complex profiles that, in dispersive conditions,
rapidly broaden or split in multiple components. Such behaviors are encoded in sharp …

Recent angle-resolved experiments using reconstruction of attosecond bursts by
interference of two-photon transitions (RABBITT) have shown that the photoionization time …

We study nondipole effects in the two-photon double ionization of helium by solving the full-
dimensional time-dependent Schrödinger equation (TDSE). The angular distributions of the …

How can one measure time?-In everyday life, a" stopwatch" method enables a convenient
and suitable timing method. When starting a process, say a 100m-sprint, a stopwatch is …