GREEN: Embedding Framework for Quantum Many-Body Simulations

We present the open-source software package GREEN. GREEN is a package for the simulation of molecular and solid quantum systems, including weak-coupling electronic structure and embedding systems, within the language of finite-temperature Green's functions. GREEN provides several applications, including those for performing fully self-consistent GW and second-order perturbation theory and self-enery embedding calculations for electronic structure problems. The talk will introduce the package, showcase applications and post-processing routines, and outline future plans.