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, 1 month ago by FANYANG. Viewing 1 post (of 1 total) Author Posts October 27, 2023 at 11:46 am #9716 FANYANGParticipant It is not valid in strong interactions, non-adiabatic effects, strong magnetic fields. 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