Introducing many-body physics using atomic spectroscopy

Abstract

Atoms constitute relatively simple many-body systems, making them suitable objects for developing an understanding of basic aspects of many-body physics. Photoabsorption spectroscopy is a prominent method to study the electronic structure of atoms and the inherent many-body interactions. In this article the impact of many-body effects on well-known spectroscopic features such as Rydberg series, Fano resonances, Cooper minima, and giant resonances is studied, and related many-body phenomena in other fields are outlined. To calculate photoabsorption cross sections the time-dependent configuration interaction singles (TDCIS) model is employed. The conceptual clearness of TDCIS in combination with the compactness of atomic systems allows for a pedagogical introduction to many-body phenomena.

15 pages, 6 figures, 1 table. The following article has been accepted by American Journal of Physics

References in corpus (5)

• Many-Body Physics with Ultracold Gases
• A mathematical and computational review of Hartree-Fock SCF methods in Quantum Chemistry
• Theory of Attosecond Transient Absorption Spectroscopy of Krypton for Overlapping Pump and Probe Pulses
• Enhanced nonlinear response of Ne${}^{8+}$ to intense ultrafast x rays
• Atomic and molecular dynamics triggered by ultrashort light pulses on the atto- to picosecond time scale

Cited by in corpus (11)

• Spin-Orbit Effects in Atomic High-Harmonic Generation
• Theoretical characterization of the collective resonance states underlying the xenon giant dipole resonance
• Controlling the $2p$ Hole Alignment in Neon via the $2s$-$3p$ Fano Resonance
• Maximizing Hole Coherence in Ultrafast Photoionization of Argon with SPA-Optimization
• Extended model for optimizing high-order harmonic generation in absorbing gases
• Relativistic time-dependent configuration-interaction singles
• Driving Rabi oscillations at the giant dipole resonance in xenon
• Nonlinear effects in photoionization over a broad photon-energy range within the TDCIS scheme
• Time-dependent configuration-interaction-singles calculation of the $5p$-subshell two-photon ionization cross section in xenon
• Collective resonances of atomic xenon from the linear to the nonlinear regime
• Semiclassical approximations of photoabsorption cross sections beyond the continuum threshold