The uniform electron gas or UEG (also known as jellium) is one of the most fundamental
models in condensed‐matter physics and the cornerstone of the most popular …

In this work, we demonstrate the viability of using distributed Gaussian orbitals as a basis set
for the calculation of the properties of electrons subjected to an external potential. We …

By combining variational Monte Carlo (VMC) and complete-basis-set limit Hartree-Fock (HF)
calculations, we have obtained near-exact correlation energies for low-density same-spin …

A formalism enabling computation of the one-particle density of a freely rotating assembly of
identical particles that vibrate about their equilibrium positions with amplitudes much smaller …

The field of quantum chemistry is introduced. The equations governing quantum chemical
phenomena are presented, and the solution to these equations are described: first, in the …

The homogeneous electron gas is one of the most studied model systems in condensed-
matter physics. It is also the basis of the large majority of approximations to the functionals of …

This thesis aims to study Wigner localization at very low densities. Almost a century ago,
Eugene Wigner predicted that a system consisting of interacting electrons in a neutralizing …

This memoir concerns the research activities I have been involved in after the end of my
PhD. In a nutshell, my PhD work deals with excited electronic states of macromolecules …