title: Multielectron correlation in high-harmonic generation: a 2D model analysis.
abstract: We analyze the role of multielectron dynamics in high-harmonic generation spectroscopy, using an example of a two-electron system. We identify and systematically quantify the importance of correlation and exchange effects. One of the main sources for correlation is identified to be the polarization of the ion by the recombining continuum electron. This effect, which plays an important qualitative and quantitative role, seriously undermines the validity of the standard approaches to high-harmonic generation, which ignore the contribution of excited ionic states to the radiative recombination of the continuum electron.
authors: Physics Department and Center for Research in Photonics, University of Ottawa, 150 Louis Pasteur, Ottawa, Ontario K1N 6N5, Canada. s.sukiasyan@uottawa.ca
authors: Suren
authors: S
authors: Sukiasyan
authors: Chris
authors: C
authors: McDonald
authors: Carlos
authors: C
authors: Destefani
authors: Misha Yu
authors: MY
authors: Ivanov
authors: Thomas
authors: T
authors: Brabec