 Electronic correlation

Electronic correlation refers to the interactions and relationships between electrons in a system that affect their spatial and spin configurations. In many-body quantum systems, such as atoms, molecules, and solids, the behavior of individual electrons cannot be described in isolation due to their mutual interactions. Instead, the properties of such systems arise from the correlated motion of electrons. Key aspects of electronic correlation include: 1. **Inter-electronic Repulsion**: Electrons are negatively charged and repel each other due to Coulomb's law.