Wigner time delay in atomic photoionization

AS Kheifets - Journal of Physics B: Atomic, Molecular and Optical …, 2023 - iopscience.iop.org
For over a century since the Nobel prize winning work by Einstein (1905 Ann. Phys. 17 132),
atomic photoionization was thought to be an instantaneous process. Recent experimental …

Bond-length dependence of attosecond ionization delays in O2 arising from electron correlation to a shape resonance

D Hammerland, T Berglitsch, P Zhang, TT Luu… - Science …, 2024 - science.org
We experimentally and theoretically demonstrate that electron correlation can cause the
bond-length sensitivity of a shape resonance to induce an unexpected vibrational state …

Attosecond interferometry of shape resonances in the recoil frame of CF4

S Heck, D Baykusheva, M Han, JB Ji, C Perry… - Science …, 2021 - science.org
Shape resonances play a central role in many areas of science, but the real-time
measurement of the associated many-body dynamics remains challenging. Here, we …

Understanding attosecond streaking

L Ortmann, A Landsman - Reports on Progress in Physics, 2024 - iopscience.iop.org
This tutorial provides an overview on the theory of attosecond streaking, a pump-probe
scheme to extract timing information of ionization processes that has been widely used in …

RABBITT phase transition across the ionization threshold

AS Kheifets, AW Bray - Physical Review A, 2021 - APS
Rich physics emerges as the result of interplay between discrete and continuous quantum
states. A process of reconstruction of attosecond beating by interference of two-photon …

[HTML][HTML] Relativistic two-photon matrix elements for attosecond delays

J Vinbladh, JM Dahlström, E Lindroth - Atoms, 2022 - mdpi.com
The theory of one-photon ionization and two-photon above-threshold ionization is
formulated for applications to heavy atoms in attosecond science by using Dirac–Fock …

Angular dependent time delay near correlation induced Cooper minima

AS Kheifets, D Toffoli, P Decleva - Journal of Physics B: Atomic …, 2020 - iopscience.iop.org
We analyze an angular dependence of the Wigner time delay near the Cooper minimum
(CM) of the sub-valent ns shell in argon, krypton and xenon. Such an angular dependence is …

Photoionization of Xe and from the shell in RABBITT fields

AW Bray, F Naseem, AS Kheifets - Physical Review A, 2018 - APS
We consider photoemission from the 4 d shell of the free Xe and encapsulated Xe@ C 60
atoms by ionizing XUV and probing IR fields typical for a RABBITT (reconstruction of …

Quantitative uncertainty determination of phase retrieval in RABBITT

JB Ji, S Heck, M Han, HJ Wörner - Optics Express, 2021 - opg.optica.org
Reconstruction of attosecond beating by interference of two-photon transitions (RABBITT) is
one of the most widely used approaches to measure the time delays in photoionization. The …

Attosecond Photoionization Dynamics: From Molecules over Clusters to the Liquid Phase

X Gong, I Jordan, M Huppert, S Heck, D Baykusheva… - Chimia, 2022 - chimia.ch
Photoionization is a process taking place on attosecond time scales. How its properties
evolve from isolated particles to the condensed phase is an open question of both …