Impact of two-electron dynamics and correlations on high-order-harmonic generation in He
The interaction of a helium atom with an intense, short, 800-nm, laser pulse is studied theoretically beyond the single-active-electron approximation. For this purpose, the time-dependent Schrödinger equation for a two-electron wave packet driven by a linearly polarized infrared pulse is solved by...
Gespeichert in:
| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
3 March 2017
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| In: |
Physical review
Year: 2017, Jahrgang: 95, Heft: 3 |
| ISSN: | 2469-9934 |
| DOI: | 10.1103/PhysRevA.95.033402 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevA.95.033402 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevA.95.033402 
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| Verfasserangaben: | Anton N. Artemyev, Lorenz S. Cederbaum, and Philipp V. Demekhin |
MARC
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| 520 | |a The interaction of a helium atom with an intense, short, 800-nm, laser pulse is studied theoretically beyond the single-active-electron approximation. For this purpose, the time-dependent Schrödinger equation for a two-electron wave packet driven by a linearly polarized infrared pulse is solved by the time-dependent restricted-active-space configuration-interaction method in the dipole velocity gauge. By systematically extending the space of active configurations, we investigate the role of the collective two-electron dynamics in the strong-field ionization and high-order-harmonic generation processes. Our numerical results demonstrate that allowing both electrons in He to be dynamically active results in a considerable extension of the computed high-order-harmonic generation spectrum. | ||
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