Home › Forums › density functional theory › the Born-Oppenheimer approximation › BO Approximation This topic has 0 replies, 1 voice, and was last updated 1 week, 1 day ago by Jaroslav_Martynov. Viewing 1 post (of 1 total) Author Posts October 4, 2025 at 10:20 pm #13407 Jaroslav_MartynovParticipant BO Approximation is not valid in cases where one has electron-nucleus coupling; in such cases different approaches like the Ehrenfest dynamics must be chosen. 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