Ultrafast Science, Volume. 3, Issue 1, 0028(2023)
Ultrafast Two-Electron Orbital Swap in Li Initiated by Attosecond Pulses
A universal mechanism of ultrafast 2-electron orbital swap is discovered through 2-photon sequential double ionization of Li. After a 1s electron in Li is ionized by absorbing an extreme ultraviolet photon, the other 2 bound electrons located on 2 different shells have either parallel or antiparallel spin orientations. In the latter case, these 2 electrons are in the superposition of the singlet and triplet states with different energies, forming a quantum beat and giving rise to the 2-electron orbital swap with a period of several hundred attoseconds. The orbital swap mechanism can be used to manipulate the spin polarization of photoelectron pairs by conceiving the attosecond-pump attosecond-probe strategy and thus serves as a knob to control spin-resolved multielectron ultrafast dynamics.
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Hui Jiang, Zhao-Han Zhang, Yang Li, Camilo Ruiz, Feng He. Ultrafast Two-Electron Orbital Swap in Li Initiated by Attosecond Pulses[J]. Ultrafast Science, 2023, 3(1): 0028
Category: Research Articles
Received: Nov. 29, 2022
Accepted: Apr. 4, 2023
Published Online: Dec. 4, 2023
The Author Email: He Feng (fhe@sjtu.edu.cn)