BerkeleyGW is a many-body perturbation theory code for excited states, using the GW method and the GW plus Bethe-Salpeter equation (GW-BSE) method to solve respectively for quasiparticle excitations and optical properties of materials. BerkeleyGW is: Suitable for 3D, 2D, 1D, and molecular systems; Applicable to insulating, metallic, and semi-metallic systems; Massively parallelized with MPI, OpenMP,…