Exploring non-adiabatic approximations to the exchange–correlation functional of TDDFT
Journal Article
·
· Physical Chemistry Chemical Physics. PCCP
- Univ. of Buenos Aires (Argentina); DOE/OSTI
- City Univ. of New York (CUNY), NY (United States)
- Max Planck Institute for the Structure and Dynamics of Matter and Center for Free-Electron Laser Science, Hamburg (Germany)
A decomposition of the exact exchange–correlation potential of time-dependent density functional theory into an interaction component and a kinetic component offers a new starting point for non-adiabatic approximations. The components are expressed in terms of the exchange–correlation hole and the difference between the one-body density matrix of the interacting and Kohn–Sham systems, which must be approximated in terms of quantities accessible from the Kohn–Sham evolution. We explore several preliminary approximations, evaluate their fulfillment of known exact conditions, and test their performance on simple model systems for which available exact solutions indicate the significance of going beyond the adiabatic approximation.
- Research Organization:
- City University of New York (CUNY), NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0015344
- OSTI ID:
- 1612279
- Alternate ID(s):
- OSTI ID: 1477207
- Journal Information:
- Physical Chemistry Chemical Physics. PCCP, Journal Name: Physical Chemistry Chemical Physics. PCCP Journal Issue: 41 Vol. 20; ISSN 1463-9076; ISSN PPCPFQ
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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