Lucia Reining - TDDFT.org
Lucia Reining - TDDFT.org
Lucia Reining - TDDFT.org
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Γ = δΣ = i ∫GWΓW = v + ∫v P WP = - i ∫GGΓΓ = δ + ∫ δΣ/δG GGΓ-i ∫GGΓ = -i GG -i ∫GG ∫ δΣ/δG GGΓP = P 0 + P 0 δΣ/δG iP Bethe SalpeterΣ = i GWP ≅ P 0 -P 0 W P χ = P 0 + P 0 (v-W) χ