Abstract
The formulation of time-dependent Kohn–Sham (TDKS) response theory based on the noninteracting one-particle density matrix is reanalyzed in detail. A transparent derivation starting from a von-Neumann-type equation of motion for the TDKS one-particle density matrix is presented. The resulting scheme has a simple structure and leads to compact expressions for frequency-dependent response properties. A systematic treatment of excited states is inferred from a pole analysis of the frequency-dependent density matrix response. A variational principle for excitation energies is established. Excited state properties are straightforward by analytical derivative techniques. The theory provides a particularly suitable starting point for linear scaling implementations. Magneto-optic properties such as rotatory strengths and the rotatory dispersion are accessible from the TDKS current-density response. The formalism is gauge-invariant. Various new sum rules within the adiabatic approximation (AA) are derived. It is shown that there is no “assignment problem” for excited states in the density matrix based formulation; the common density based approach is included as a special case. Merits and limitations of the AA are discussed.
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Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 10:16 a.m.) |
Deposited | 1 year, 6 months ago (Feb. 6, 2024, 7:10 p.m.) |
Indexed | 3 weeks, 3 days ago (Aug. 7, 2025, 4:47 p.m.) |
Issued | 24 years, 4 months ago (April 8, 2001) |
Published | 24 years, 4 months ago (April 8, 2001) |
Published Print | 24 years, 4 months ago (April 8, 2001) |
@article{Furche_2001, title={On the density matrix based approach to time-dependent density functional response theory}, volume={114}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1353585}, DOI={10.1063/1.1353585}, number={14}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Furche, Filipp}, year={2001}, month=apr, pages={5982–5992} }