Nondipole Coulomb effects in strong x-ray field ionization
Abstract
Atomic ionization in superintense x-ray fields is studied through numerical solutions of the time-dependent Schrödinger equation including nondipole corrections. The role of the Coulomb potential of the atomic core in the nondipole regime is analyzed for a linearly polarized laser field. In the considered high-frequency and high-intensity stabilization regime, the photoelectron spectra are dominated by a near-zero-energy structure, while above-threshold ionization peaks are suppressed. Two sub-regimes in the nondipole case are identified based on the scaling of the Coulomb momentum transfer, when the Coulomb effect during the interaction with the laser field is either significant or minor. The Coulomb influenced regime sets in within the realm of relatively low field strengths, high laser frequencies, and long pulse durations. An intuitive model explaining the distinct features in the photoelectron momentum distributions and the Coulomb effect scaling is provided.
Related
- Qprop-ND: A Nondipole Extension of the Qprop Package for Strong-Field Laser Physics
- A field-quadrature perspective on strong-field ionization with squeezed light
- Quantum tomography of bright squeezed vacuum via strong-field ionization
- Electron spectra from strong-field enhanced ionization in heavy water
- Deser formula for the shift of energy levels of hadronic atoms in terms of the effective radius of the strong interaction with the Coulomb wave function of hadronic atoms at the origin
BibTeX
@misc{he2026nondipole,
title = {{Nondipole Coulomb effects in strong x-ray field ionization}},
author = {Haoyuan He and Karen Z. Hatsagortsyan and Christoph H. Keitel},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.11791},
eprint = {2609.11791},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.11791},
}
RIS
TY - UNPB
TI - Nondipole Coulomb effects in strong x-ray field ionization
AU - Haoyuan He
AU - Karen Z. Hatsagortsyan
AU - Christoph H. Keitel
PY - 2026
DA - 2026/09/10
PB - arXiv
DO - 10.48550/arxiv.2609.11791
UR - https://arxiv.org/abs/2609.11791
AB - Atomic ionization in superintense x-ray fields is studied through numerical solutions of the time-dependent Schrödinger equation including nondipole corrections. The role of the Coulomb potential of the atomic core in the nondipole regime is analyzed for a linearly polarized laser field. In the considered high-frequency and high-intensity stabilization regime, the photoelectron spectra are dominated by a near-zero-energy structure, while above-threshold ionization peaks are suppressed. Two sub-regimes in the nondipole case are identified based on the scaling of the Coulomb momentum transfer, when the Coulomb effect during the interaction with the laser field is either significant or minor. The Coulomb influenced regime sets in within the realm of relatively low field strengths, high laser frequencies, and long pulse durations. An intuitive model explaining the distinct features in the photoelectron momentum distributions and the Coulomb effect scaling is provided.
ER -