Home › Forums › density functional theory › the Born-Oppenheimer approximation › Breakdown of Born-Oppenheimer approximation This topic has 0 replies, 1 voice, and was last updated 1 year, 2 months ago by Diego De Gusem. Viewing 1 post (of 1 total) Author Posts October 2, 2023 at 3:23 pm #9239 Diego De GusemParticipant I think that the approximation fails when we are working at very high temperatures. In those cases the kinetic energies of the nuclei will be important. 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