Home › Forums › density functional theory › the Born-Oppenheimer approximation › Born Oppenheimer Breakdown This topic has 0 replies, 1 voice, and was last updated 1 day, 12 hours ago by chloe_buschmann. Viewing 1 post (of 1 total) Author Posts October 22, 2025 at 3:48 pm #13701 chloe_buschmannParticipant If you can’t separate the motion of the electrons and nuclei, this approximation would breakdown. This would happen when the electrons and nuclei have similar energy scales (aka degeneracy) 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