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.

8 pages, 6 figures, 1 table

References in corpus (2)

• Non-linear phenomena in time-dependent density-functional theory: What Rabi physics can teach us
• Route to Direct Multiphoton Multiple Ionization

Cited by in corpus (4)

• Impact of the electronic band structure in high-harmonic generation spectra of solids
• Efficient and accurate modeling of electron photoemission in nanostructures with TDDFT
• Some Exact Properties of the Nonequilibrium Response Function for Transient Photoabsorption
• A simple derivation of the exact quasiparticle theory and its extension to arbitrary initial excited eigenstates