A Real-Space Implementation of the Bethe-Salpeter formalism for the calculation of optical spectra of large, molecular systems
Key features:
- Real-space, minimal tight-binding basis
- Two-centre approximation
- Molecular systems only
- Full BSE (not restricted to Tamm-Dancoff approximation)
- Monopole approximation for terms beyond nearest neighbours
- Compute optical absorption spectra and optical band gaps
- Tested up to 6000 atoms (as of 2017)