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Volumn 11, Issue 22, 2009, Pages 4564-4569

Excitation energies from ground-state density-functionals by means of generator coordinates

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EID: 66749094216     PISSN: 14639076     EISSN: None     Source Type: Journal    
DOI: 10.1039/b902529d     Document Type: Article
Times cited : (2)

References (47)
  • 8
    • 0035844611 scopus 로고    scopus 로고
    • Strictly speaking, this additional step is only straightforward in the charge-density-only formulation of DFT. If spin or current densities are employed, additional complications arise related to the nonuniqueness of the external potentials in DFTs that employ more than one density variable. The present work is not affected by these complications, and can be extended to multi-density DFTs, such as spin-DFT, without formal problems
    • K. Capelle G. Vignale Phys. Rev. Lett. 2001 86 5546
    • (2001) Phys. Rev. Lett. , vol.86 , pp. 5546
    • Capelle, K.1    Vignale, G.2
  • 30
    • 66749142757 scopus 로고    scopus 로고
    • In fact, the large number of possible variations on the GCM+DFT theme can equally be seen as an advantage of the method (allowing enormous flexibility in choosing the deformation, and the resulting physics) or a disadvantage (since no single answer may be the best for all purposes, and systematic prescriptions for choosing the best generator coordinate are still lacking)
    • In fact, the large number of possible variations on the GCM+DFT theme can equally be seen as an advantage of the method (allowing enormous flexibility in choosing the deformation, and the resulting physics) or a disadvantage (since no single answer may be the best for all purposes, and systematic prescriptions for choosing the best generator coordinate are still lacking)
  • 36
    • 66749095822 scopus 로고    scopus 로고
    • opmks: Basis-set free atomic DFT program written by E. Engel, University of Frankfurt, Germany
    • opmks: Basis-set free atomic DFT program written by E. Engel, University of Frankfurt, Germany
  • 47
    • 66749148659 scopus 로고    scopus 로고
    • note
    • An additional feature of the GCM approach, which is not explored here, is that it produces a simple few-determinant wave function corresponding to the energies. In practice, this wave function is given by the seed wave functions, weighted by the values of f(α) obtained from solving the GHW equation. Interestingly, this information becomes available at no extra computational expense, in addition to the one required for the energies. Differently from the undeformed KS determinant, this wave function does not necessarily reproduce the correct density, but unlike that determinant, it is by construction an approximation to the many-body wave function


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.