A coupled Hartree-Fock approximation for describing the effects of time-dependent perturbations on many-electron systems is presented. It is applied to the calculation of the frequency-dependent ...

Abstract. We study the ground state of a trapped Bose gas, starting from the full many-body Schrödinger Hamiltonian, and derive the non-linear Schrödinger energy functional in the limit of a large ...

The restriction of the trial space to product functions corresponds to the Hartree approximation in physics. (In a Hartree-Fock approximation the product functions are antisymmetrized under coordinate ...

Computational chemistry encompasses the simulation and theoretical modelling of chemical systems, providing insights into reaction dynamics, electronic structure, and molecular interactions. Density ...