ExSCF is a program for methods based on Projected Hartree-Fock, which aims to achieve multireference accuracy with SCF cost.
Of course we need numpy, scipy, etc., but these are also required by PySCF, so they are not listed here.
- git clone
- add
/path/to/ExSCF
to yourPYTHONPATH
Theoretical features:
- SUHF (Spin-projected Unrestricted Hartree-Fock) (10.1063/1.4705280)
- energy
- 1pdm, natural orbitals, 2pdm
not fully tested:
- SUHF+DFT, SUHF+fDFT, SUHF+fcDFT (10.1063/1.4796545)
- CAS+fDFT, CAS-DFT2
- DeltaSCF with MOM
in developing:
- SU-PDFT
- EMP2(0) (10.1063/1.4898804)
Technical features:
- guess
- mix (
guess.mix
) - fragment (
guess.from_frag
) - stablize UHF (
guess.check_stab
)
- mix (
- converging strategy
- DIIS (
diis_on = True
) level_shift =
(in a.u.)
- DIIS (
- interface (require MOKIT)
- read guess MO from fch (
guess.from_fch_simp
) - dump MO, NO to fch (
tofch = True
)
- read guess MO from fch (
more guess strategies are included in pyAutoMR.
from pyphf import suscf, guess
xyz = 'H 0.0 0.0 0.0; H 0.0 0.0 2.0'''
bas = '3-21g'
mf = guess.mix(xyz, bas, conv='tight')
mf2 = suscf.SUHF(mf)
mf2.kernel()
For bug report or comments, please contact the author via srwang20@fudan.edu.cn or open an issue.
- SUPT2
- TD-SUHF
- SUHF gradient