Diagonal Born-Oppenheimer correction


Cross-posted from Getting diagonal correction of Born-Oppenheimer approximation from PSI3

I saw https://onlinelibrary.wiley.com/doi/10.1002/jcc.20573
mentioned there is a diagonal Born-Oppenheimer correction (DBOC) in PSI3.

It seems in PSI4, DBOC is an interface to CFOUR

I hope DBOC will also be available in PSI4.

I opened an issue on github for you [feature request] Diagonal Born-Oppenheimer correction · Issue #2149 · psi4/psi4 · GitHub
Progress will be tracked there.