https://doi.org/10.1140/epjd/s10053-024-00900-z
Regular Article - Ultraintense and Ultrashort Laser Fields
R-matrix with time-dependence calculations for three-sideband RABBITT in helium
1
Department of Physics, University of Windsor, N9B 3P4, Windsor, ON, Canada
2
Department of Physics and Astronomy, Drake University, 50311, Des Moines, IA, USA
3
Department of Physics, Panskura Banamali College (Autonomous), 721152, Panskura, West Bengal, India
4
Department of Physics, University of Colorado Denver, 80204, Denver, CO, USA
5
Max-Planck-Institute for Nuclear Physics, 69117, Heidelberg, Germany
6
Center for Optical Technologies, Aalen University, 73430, Aalen, Germany
Received:
11
April
2024
Accepted:
30
July
2024
Published online:
14
August
2024
Following up on a recent paper (Bharti et al. in Phys Rev A 109:023110, 2024), we compare the predictions from several R-matrix with time-dependence calculations for a modified three-sideband version of the “reconstruction of attosecond beating by interference of two-photon transitions” (RABBITT) configuration applied to helium. Except for the special case of the threshold sideband, which appears to be very sensitive to the details of coupling to the bound Rydberg states, increasing the number of coupled states in the close-coupling expansion used to describe the ejected-electron–residual-ion interaction hardly changes the results. Consequently, the remaining discrepancies between the experimental data and the theoretical predictions are likely due to uncertainties in the experimental parameters, particularly the detailed knowledge of the laser pulse.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
