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Exploring non-adiabatic approximations to the exchange–correlation functional of TDDFT

Journal Article · · Physical Chemistry Chemical Physics. PCCP
DOI:https://doi.org/10.1039/c8cp03957g· OSTI ID:1612279
 [1];  [2];  [3];  [2]
  1. Univ. of Buenos Aires (Argentina); DOE/OSTI
  2. City Univ. of New York (CUNY), NY (United States)
  3. 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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Cited By (3)

Propagation of maximally localized Wannier functions in real-time TDDFT journal May 2019
X-ray linear and non-linear spectroscopy of the ESCA molecule journal September 2019
Propagation of maximally localized Wannier functions in real-time TDDFT text January 2019

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