What Does ECISDT Stand For?

ECISDT stands for Size Extensive CI With Single And Double And Triple Excitations

ECISDT, or Size Extensive Configuration Interaction with Single, Double, and Triple Excitations, is a sophisticated computational method used in quantum chemistry. It extends the traditional configuration interaction approach by including single, double, and triple excitation configurations, ensuring that the system's size extensivity is maintained. This method provides a more comprehensive and accurate description of electronic correlation effects in molecular systems, making it particularly valuable for studying complex chemical reactions and properties in many-body systems.