2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/160134We investigate a pair entanglement of electrons in diatomic molecule, modeled as a correlated double quantum dot attached to the leads. The low-temperature properties are derived from the ground state obtained by utilizing the Rejec-Ramsak variational technique within the framework of EDABI method, which combines exact diagonalization with ab initio calculations. The results show, that single-particle basis renormalization modifies the entanglement-switch effectiveness significantly. We also found the entanglement signature of a competition between an extended Kondo and singlet phases.To be presented on "The International Conference on Strongly Correlated Electron Systems" SCES'07, May 13-18, Houston, USAStrongly Correlated Electronstext