Home › Forums › density functional theory › the Born-Oppenheimer approximation › the Born-Oppenheimer approximation This topic has 0 replies, 1 voice, and was last updated 1 year, 6 months ago by quantumbishnu56. Viewing 1 post (of 1 total) Author Posts May 25, 2023 at 4:41 pm #8568 quantumbishnu56Participant this theory fails at following conditions 1. adiabatic processes 2 ultrafast processes 3 quantum tunneling 4 strongly correlated systems 5 non equilibrium conditions 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