  BerkeleyGW is a massively parallel computational package for electron
excited-state properties that is based on the many-body perturbation theory
employing the ab initio GW and GW plus Bethe-Salpeter equation methodology. It
can be used in conjunction with many density-functional theory codes for
ground-state properties, including PARATEC, PARSEC, Quantum ESPRESSO, OCTOPUS
and SIESTA. The package can be used to compute the electronic and optical
properties of a wide variety of material systems from bulk semiconductors and
metals to nanostructured materials and molecules. The package scales to
10,000's of CPUs and can be used to study systems containing up to 100's of
atoms.
