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Natural orbitals of helium in linearly polarized laser fields

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  • Julius Rapp

    (Institut für Physik, Universität Rostock)

  • Dieter Bauer

    (Institut für Physik, Universität Rostock)

Abstract

Practicable equations of motion for the natural orbitals of a spin-singlet helium atom in a linearly polarized laser field are presented. The cylindrical symmetry of the two-electron problem with quantum number M = 0 is shown to yield a sparse expansion of natural orbitals in spherical harmonics. This optimization facilitates the propagation of renormalized natural orbitals of the helium atom. As a demonstration, the equations of motion are solved for a high-harmonic-generation process. In addition to the expected plateau from the single-active-electron picture, the spectrum of emitted radiation features a second plateau at higher harmonic orders.

Suggested Citation

  • Julius Rapp & Dieter Bauer, 2018. "Natural orbitals of helium in linearly polarized laser fields," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 91(7), pages 1-11, July.
    • Handle: RePEc:spr:eurphb:v:91:y:2018:i:7:d:10.1140_epjb_e2018-90178-5
    DOI: 10.1140/epjb/e2018-90178-5
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