A GW+BSE implementation in the ABACUS+LibRPA framework uses real-space locality of the screened Coulomb interaction to Fourier-interpolate from a coarse to a dense k-mesh, validated by molecular and solid-state benchmarks.
Strinati, Effects of dynamical screening on resonances at inner-shellthresholdsinsemiconductors,Phys.Rev.B29,5718 (1984)
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Efficient Bethe-Salpeter Equation Calculations Based on Numerical Atomic Orbitals and Norm-Conserving Pseudopotentials: Dual-${\boldsymbol k}$-Mesh Strategy
A GW+BSE implementation in the ABACUS+LibRPA framework uses real-space locality of the screened Coulomb interaction to Fourier-interpolate from a coarse to a dense k-mesh, validated by molecular and solid-state benchmarks.