Bethe-Salpeter equation

VASP can compute the frequency-dependent dielectric function with excitonic effects based on the Bethe-Salpeter equation. The calculation can be done on top of the electronic ground-state within DFT, using a hybrid functional or the GW approximation.

Content

Part 1: Optical absorption of diamond carbon
Part 2: Optical absorption of LiF
Part 3: Efficient Brillouin zone sampling and analysis of the excitons

Further resources

Also check out the [BSE category on the VASP Wiki](https://www.vasp.at/wiki/index.php/Category:Bethe-Salpeter equations) for a detailed documentation of BSE features implemented in VASP.