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 …

We review the many-body Green's function Bethe–Salpeter equation (BSE) formalism that is
rapidly gaining importance for the study of the optical properties of molecular organic …

In recent years, Green's function methods have garnered considerable interest due to their
ability to target both charged and neutral excitations. Among them, the well-established GW …

We present an implementation of excited-state analytic gradients within the Bethe–Salpeter
equation formalism using an adapted Lagrangian Z-vector approach with a cost …

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 …

Organic solar cells hold promise of providing low‐cost, renewable power generation, with
current devices providing up to 13% power conversion efficiency. The rational design of …

Like adiabatic time-dependent density-functional theory (TD-DFT), the Bethe–Salpeter
equation (BSE) formalism of many-body perturbation theory, in its static approximation, is …

The Bethe–Salpeter equation (BSE) formalism is a computationally affordable method for
the calculation of accurate optical excitation energies in molecular systems. Similar to the …

Double, Rydberg, and charge transfer (CT) excitations have been great challenges for time-
dependent density functional theory (TDDFT). Starting from an (N±2)-electron single …

While the well-established GW approximation corresponds to a resummation of the direct
ring diagrams and is particularly well suited for weakly correlated systems, the T-matrix …