Symmetry-adapted formulation of the hybrid treatment resulting from the G-particle-hole Hypervirial equation and equations of motion methods: a procedure for modeling solids

Highly accurate electron affinities and ionization potentials of chemical systems were described by means the procedure called GHV-EOM (Valdemoro et al, in Int J Quantum Chem 112:2965, 2012), which combines G-particle-hole hypervirial (GHV) equation method (Alcoba 109:3178, 2009) that equations-of-motion (EOM), Simons Smith (Simons Smith, Phys 58:4899, 1973). The present work improves hybrid introducing point group symmetry within its framework, providing a higher computational efficiency. We report results show achievements attained using symmetry-adapted methodology. new formulation turns out to be particularly suitable for characterizing solid models, as cyclic one-dimensional chains.