Impact of two-electron dynamics and correlations on high-order-harmonic generation in He

• Verfasst von: Artemyev, Anton [VerfasserIn]
• Verfasst von: Cederbaum, Lorenz S. [VerfasserIn]
• Verfasst von: Demekhin, Philipp V. [VerfasserIn]
• Titel: Impact of two-electron dynamics and correlations on high-order-harmonic generation in He
• Verf.angabe: Anton N. Artemyev, Lorenz S. Cederbaum, and Philipp V. Demekhin
• E-Jahr: 2017
• Jahr: 3 March 2017
• Umfang: 7 S.
• Fussnoten: Gesehen am 13.08.2018
• Titel Quelle: Enthalten in: Physical review
• Ort Quelle: Woodbury, NY : Inst., 2016
• Jahr Quelle: 2017
• Band/Heft Quelle: 95(2017,3) Artikel-Nummer 033402, 7 Seiten
• ISSN Quelle: 2469-9934
• DOI: doi:10.1103/PhysRevA.95.033402
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1578519942

Abstract

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.