2010/06/10 by Sølve Selstø, Selstø, Sølve, Tore Birkeland +7
Physics and Astronomy · #Advanced Chemical Physics Studies #Atomic Physics (physics.atom-ph) #Atomic and Molecular Physics #Computational Physics (physics.comp-ph) #FOS: Physical sciences #Quantum Physics (quant-ph) #Spectroscopy and Quantum Chemical Studies
paper · pdf · doi:10.48550/arxiv.1006.1984
openalex publication_date 2010/06/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The process of nonsequential two-photon double ionization of helium is\nstudied by two complementary numerical approaches. First, the time-dependent\nSchr "odinger equation is solved and the final wave function is analyzed in\nterms of projection onto eigenstates of the uncorrelated Hamiltonian, i.e.,\nwith no electron-electron interaction included in the final states. Then, the\ndouble ionization probability is found by means of a recently developed\napproach in which the concept of absorbing boundaries has been generalized to\napply to systems consisting of more than one particle. This generalization is\nachieved through the Lindblad equation. A model of reduced dimensionality,\nwhich describes the process at a qualitative level, has been used. The\nagreement between the methods provides a strong indication that procedures\nusing projections onto uncorrelated continuum states are adequate when\nextracting total cross sections for the direct double ionization process.\n