What Does FOCI Stand For?

FOCI stands for First Order Configuration Interaction

FOCI, or First Order Configuration Interaction, is a computational method used in quantum chemistry to account for electron correlation effects in molecular systems. It employs a linear combination of the first-order excited states derived from a reference wavefunction, allowing for a more accurate description of electronic interactions compared to single-reference methods. FOCI is particularly useful in the study of excited states and can significantly enhance the predictability of molecular properties and behaviors in various chemical environments.