Third-Order Algebraic Diagrammatic Construction Renormalized by Particle-Particle Ladders
The algebraic diagrammatic construction (ADC) of electronic self-energy is improved by introducing EN-dressed denominators derived from the particle-particle T-matrix approximation. This third-order method significantly increases accuracy for closed-shell molecules, reaching EOM levels. The dressing captures higher excitations missed by standard methods, providing a more reliable description of energy.