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Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry
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Published on: April 8, 2020

Time-dependent density-functional theory with a self-interaction correction.

J Messud1, P M Dinh, P-G Reinhard

  • 1Laboratoire de Physique Théorique, IRSAMC, CNRS, Université de Toulouse, F-31062 Toulouse, France.

Physical Review Letters
|October 15, 2008
PubMed
Summary
This summary is machine-generated.

We present a new method to correct self-interaction errors in time-dependent density-functional theory. This approach improves calculations for laser-induced molecular ionization, enhancing accuracy in computational chemistry.

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Area of Science:

  • Computational chemistry
  • Quantum mechanics
  • Atomic and molecular physics

Background:

  • Self-interaction error is a known issue in density-functional theory approximations.
  • Accurate modeling of molecular dynamics under external fields is crucial.

Purpose of the Study:

  • To implement and test a self-interaction correction for time-dependent density-functional theory.
  • To develop a practical computational scheme for studying laser-matter interactions.

Main Methods:

  • A variational formulation for self-interaction correction was developed.
  • A transparent propagation scheme using two sets of wave functions was employed.
  • The method was applied to laser excitation and ionization of a dimer molecule.

Main Results:

  • The proposed self-interaction correction was successfully implemented.
  • The propagation scheme proved manageable and transparent.
  • The method was validated through application to a dimer ionization process.

Conclusions:

  • The developed method offers a viable approach to mitigate self-interaction errors in TDDFT.
  • This work provides a foundation for more accurate simulations of molecular photoionization.