2014/09/30 by M. Brics, J. Rapp, D. Bauer · 1 citation
Chemistry · Physics and Astronomy · #Advanced Chemical Physics Studies #Atom (system on chip) #Atomic orbital #Atomic physics #Computer science #Double ionization #Electron #Ionization #Laser-Matter Interactions and Applications #Mass Spectrometry Techniques and Applications #Physics #Quantum mechanics #physics.atom-ph #physics.chem-ph #physics.comp-ph #quant-ph
paper · pdf · doi:10.1103/physreva.90.053418
published as M. Brics, J. Rapp, and D. Bauer, Phys. Rev. A 90, 053418, (2014) · 7 pages, 5 figures, REVTeX
openalex publication_date 2014/11/14 · arxiv created 2014/11/17 · arxiv updated 2014/11/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Recently introduced time-dependent renormalized-natural-orbital theory (TDRNOT) is tested on nonsequential double ionization (NSDI) of a numerically exactly solvable one-dimensional model He atom subject to few-cycle, 800-nm laser pulses. NSDI of atoms in strong laser fields is a prime example of nonperturbative, highly correlated electron dynamics. As such, NSDI is an important ``worst-case'' benchmark for any time-dependent few and many-body technique beyond linear response. It is found that TDRNOT reproduces the celebrated NSDI ``knee,'' i.e., a many-order-of-magnitude enhancement of the double-ionization yield (as compared to purely sequential ionization) with only the ten most significant natural orbitals (NOs) per spin. Correlated photoelectron spectra---as ``more differential'' observables---require more NOs.