GREEN: Embedding Framework for Quantum Many-Body Simulations

We present the quantum embedding and post-processing modules of the open-source software package GREEN. GREEN is designed for the simulation of molecular and solid quantum systems, including weak-coupling electronic structures and embedding systems, within the framework of finite-temperature Green's functions. It supports fully self-consistent GW and second-order perturbation theory as well as self-energy embedding calculations for electronic structure problems. Additionally, GREEN offers a set of post-processing utilities for analytical continuation, Mulliken analysis, and Wannier interpolation.