Home › Forums › density functional theory › correlation › different definition This topic has 0 replies, 1 voice, and was last updated 2 years, 2 months ago by Luka De Bolle. Viewing 1 post (of 1 total) Author Posts October 8, 2022 at 11:08 am #6990 Luka De BolleParticipant You can’t use the same definition, because in quantum mechanics, there is an additional step between the sum of the single body systems and the exact solution. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In