Multireference perturbation theory (MRPT) occupies a central role in contemporary electronic structure methods by addressing systems where a single reference determinant fails to capture key ...

When DFT or CC fails, then multireference methods are often the methods of choice in chemistry. In these methods one uses the “diagonalize-then-perturb” strategy, whereby the Hamiltonian is first ...

Electronic structure analysis seeks to determine the arrangement and energies of electrons in molecules and materials, providing a foundation for understanding chemical reactivity, spectroscopic ...