Local density-functional theory of frequency-dependent linear response.

TL;DR: In this article , a simple one-step top-down embedding procedure for generating a set of orbitals, which are localized in terms of the supermolecule but delocalized over each subsystem composing the super molecule, is presented.

TL;DR: The gentlest ascent dynamics for Kohn-Sham density functional theory is developed to search for the index-1 saddle points on the energy landscape of the Kohn -Sham density functionals, which correspond to excited states in the ground state functionals.

TL;DR: The theoretical findings are related to existing experimental spinpolarized electron energy loss spectroscopy results and show that in bulk bcc Fe, the longitudinal magnetic modes appear above the typical energies of transverse spin-waves, have energies comparable with the Stoner spin-flip excitation continuum and are order of magnitude less energetic than the charge dynamics.

TL;DR: Group IV monochalcogenides have attracted significant recent attention due to their similarities to black phosphorus and their potential applications in "twistronics" inspired by the synthesis of... as discussed by the authors.

TL;DR: In this article, the ground state of an interacting electron gas in an external potential was investigated and it was proved that there exists a universal functional of the density, called F[n(mathrm{r})], independent of the potential of the electron gas.

TL;DR: In this article, a time-dependent version of density functional theory was proposed to deal with the non-perturbative quantum mechanical description of interacting many-body systems moving in a very strong timedependent external field.

TL;DR: Theoretical predictions on the dynamic properties are compared with the x ray and electron scattering data for the metallic electrons as discussed by the authors, and screening effects are analyzed and applied to calculations of the enhancement factor of the thermonuclear reaction rate and the electric resistivity in dense plasmas.

TL;DR: In this article, a density-functional theory for describing polarization-type many-body effects influencing the photoresponse of small electronic systems is presented. But it does not take account of the time-dependent fields induced by an external radiation field.