Time-Dependent Density-Functional Theory of Strong-Field Ionization of Atoms under Soft X-Rays

Abstract

We demonstrate the capabilities of time-dependent density functional theory (TDDFT) for strong-field, short wavelength (soft X-ray) physics, as compared to a formalism based on rate equations. We find that TDDFT provides a very good description of the total and individual ionization yields for Ne and Ar atoms exposed to strong laser pulses. We assess the reliability of different adiabatic density functionals and conclude that an accurate description of long-range interactions by the exchange and correlation potential is crucial for obtaining the correct ionization yield over a wide range of intensities ($10^{13}$ -- $5\times 10^{15}$ W/cm${}^2$). Our TDDFT calculations disentangle the contribution from each ionization channel based on the Kohn-Sham wavefunctions.

arXiv comment8 pages, 6 figures, 1 table

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Cited by in corpus (6)

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• Some Exact Properties of the Nonequilibrium Response Function for Transient Photoabsorption
• First-principles simulations for attosecond photoelectron spectroscopy based on time-dependent density functional theory
• Time-resolved spectroscopy at surfaces and adsorbate dynamics: insights from a model-system approach
• A simple derivation of the exact quasiparticle theory and its extension to arbitrary initial excited eigenstates