The GW approximation in electronic structure theory has become a widespread tool for
predicting electronic excitations in chemical compounds and materials. In the realm of …

We review state-of-the-art electronic structure methods based both on wave function theory
(WFT) and density functional theory (DFT). Strengths and limitations of both the wave …

Many observables such as the density, total energy, or electric current, can be expressed
explicitly in terms of the one‐body Green's function, which describes electron addition or …

The Bethe–Salpeter equation (BSE) formalism is steadily asserting itself as a new efficient
and accurate tool in the ensemble of computational methods available to chemists in order …

For the recent GW 100 test set of molecular ionization energies, we present a
comprehensive assessment of different GW methodologies: fully self-consistent GW (sc GW) …

Strong correlations within a symmetry-unbroken ground-state wavefunction can show up in
approximate density functional theory as symmetry-broken spin densities or total densities …

This review explains the relationship between density functional theory and strongly
correlated models using the simplest possible example, the two-site Hubbard model. The …

An effective fractional-spin correction is developed to describe static/strong correlation in
density functional theory. Combined with the fractional-charge correction from recently …

The exact-exchange plus random-phase approximation (EXX+ RPA) method has emerged
as a crucial tool for precisely characterizing electronic structures in molecular and solid …

Using the simple (symmetric) Hubbard dimer, we analyze some important features of the GW
approximation. We show that the problem of the existence of multiple quasiparticle solutions …