Theoretical analysis of attosecond quantum beat spectroscopy of helium excited states

29th International Conference on Photonic, Electronic, and Atomic Collisions

Zimmermann, T.^1,3 ; Landsman, A.S.^1,3 ; Lucchini, M.^2 ; Ludwig, A.^2 ; Kasmi, L.^2 ; Herrmann, J.^2 ; Gallmann, L.^2 ; Scrinzi, A.^4 ; Keller, U.^2

Seminar for Applied Mathematics, ETH Zürich, Zürich

CH-8093, Switzerland^1

Department of Physics, ETH Zürich, Zürich

CH-8093, Switzerland^2

Max Planck Institute for the Physics of Complex Systems, Dresden, Germany^3

Fakultät für Physik, Ludwig-Maximilians-Universität München, München

80333, Germany^4

关键词: Attoseconds;    Photoelectron spectrum;    Probability flux;    Quantum beat spectroscopy;    Quantum beating;    Single electron;    Surface flux;    Time dependent;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/9/092141/pdf
DOI  :  10.1088/1742-6596/635/9/092141

来源: IOP

【 摘 要 】

Photoelectron spectra measured in the attosecond quantum beat spectroscopy experiment on helium were computed solving the single-electron time-dependent Schrdinger equation. Final momenta of photoelectrons were obtained from the probability flux at the boundary of the simulation region using the time-dependent surface flux (t-SURFF) method [1]. Reaching a very good agreement with the experimental results, simulations allow for deeper understanding of processes underlying the quantum beating, which-way interference and polarization of the excited state.