Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session S02: Strong-field and attosecond electron dynamics
10:30 AM–12:42 PM,
Thursday, June 3, 2021
Chair: Alexandra Landsman, Ohio State University
Abstract: S02.00005 : The role of electron correlation in strong-field ionization of molecules studied using the molecular R-matrix with time approach*
11:18 AM–11:30 AM
Live
Presenter:
Zdenek Masin
(Institute of Theoretical Physics, Charles University)
Authors:
Zdenek Masin
(Institute of Theoretical Physics, Charles University)
Jakub Benda
(Institute of Theoretical Physics, Charles University)
Jimena D Gorfinkiel
(The Open University)
Gregory Armstrong
(Queen's University Belfast)
Andrew Brown
(Queen's University Belfast)
Daniel Clarke
(Queen's University Belfast)
Hugo W van der Hart
(Queen's University Belfast)
Jack Wragg
(Queen's University Belfast)
Collaboration:
UK-AMOR
The role of electron correlation in single photon ionization has been studied in detail for decades but it is much harder to do the same in the strong field regime. On the theory side the challenges are to represent simultaneously the ionized electron, the electronic structure of the target molecule and the multi-electron interaction; all in the presence of the time-dependent strong field. For that reason a number of theoretical approaches have been developed with different strengths and weaknesses.
Recently, we have extended to molecules the originally atomic R-matrix method with time. The method works in the Close-Coupling representation which allows studying the role of state coupling and electron correlation in detail. We use it to show that at intensities up to 50 TW/cm2 state coupling determines the shape of the polarization-orientation-dependent yields: when the ionic states are coupled the yields always resemble the shape of the HOMO even though the involved states are not dipole-coupled. This effect is caused by the field-free and field-assisted electron correlation.
*ZM and JB acknowledge support from the Czech Science Foundation through (GA CR 20-15548Y) and the PRIMUS project of the Charles University (20/SCI/003).
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