Ultrafast Two-Electron Orbital Swap in Li Initiated by Attosecond Pulses

Hui Jiang; Zhao-Han Zhang; Yang Li; Camilo Ruiz; and Feng He

doi:10.34133/ultrafastscience.0028

Ultrafast Two-Electron Orbital Swap in Li Initiated by Attosecond Pulses

doi: 10.34133/ultrafastscience.0028

a Key Laboratory for Laser Plasmas (Ministry of Education) and School of Physics and Astronomy,Collaborative Innovation Center for IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240,China.
b Instituto Universitario de Física Fundamental y Matemáticas, Universidad de Salamanca, Plaza de la Merced s/n, 37008 Salamanca, Spain.
c CAS Center for Excellence in Ultra-intense Laser Science,Shanghai 201800, China.

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出版历程
- 收稿日期: 2022-11-29
- 修回日期: 2023-04-04
- 刊出日期: 2023-06-15

Ultrafast Two-Electron Orbital Swap in Li Initiated by Attosecond Pulses

摘要

摘要: 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.
- orbital swap /
- quantum beat /
- spin polarization of photoelectron pairs /
- spin-resolved
Abstract: 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.
- orbital swap /
- quantum beat /
- spin polarization of photoelectron pairs /
- spin-resolved