Potentials, exchange, and correlation in attosecond photoemission delays

2021/03/26 by Hakon Volkmann, Volkmann, Hakon, Vinay P. Majety +3
Physics and Astronomy · #Atomic Physics (physics.atom-ph) #FOS: Physical sciences #physics.atom-ph

paper · pdf · doi:10.48550/arxiv.2103.14447

arxiv created 2021/03/29 · arxiv updated 2021/03/30

Abstract

We investigate attosecond time delays in the emission of photoelectrons using a hierarchy of models of the CO₂ molecule including the strong field approximation, Coulomb-scattering, short-range parts of the molecular potential, Hartree and Hartree-Fock descriptions. In addition, we present an \it ab initio calculation based on quantum-chemical structure in combination with strong-field techniques, which fully includes multi-electron exchange and correlation. Every single of these model constituents is found to modify delays on the scale of 10 as or more, with exchange and correlation having the most pronounced effect.

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