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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…