configuration interaction 1perfect-pairing reference 1perturbation theory 1Richardson-Gaudin models 1strongly correlated electrons 1
From the 1 of 3 linked papers with an AI index.
3 papers
physics.chem-ph2026
Richardson-Gaudin states of non-zero seniority III: The Perfect-Pairing limit
Paul A. Johnson
The paper introduces a simplified perfect‑pairing reference based on Richardson‑Gaudin states for treating strongly correlated electrons, achieving polynomial computational cost wi…
physics.chem-ph2025
Richardson-Gaudin states of non-zero seniority II: Single-reference treatment of strong correlation
Paul A. Johnson
Strongly correlated systems are well described as a configuration interaction of Slater determinants classified by their number of unpaired electrons. This treatment is however unf…
physics.chem-ph2025
Richardson-Gaudin states of non-zero seniority I: matrix elements
Paul A. Johnson
Seniority-zero wavefunctions describe bond-breaking processes qualitatively. As eigenvectors of a model Hamiltonian, Richardson-Gaudin states provide a clear physical picture and a…