Source code for Automatic Differentiation for the Direct Minimization Approach to the Hartree-Fock Method (arXiv).

• JAX
• PySCF
• SciPy
• NumPy
• matplotlib

You can install dependencies with requirements.txt.

pip install -r requirements.txt

We tested our program with Python 3.8.10 on Ubuntu 20.04.5 LTS.

python diatomic.py H2 STO-3G

python diatomic.py H2 3-21G

python diatomic.py HF STO-3G

python diatomic.py HF STO-3G

python polyatomic_angle.py H2O

python polyatomic_angle.py NH3

python ad_vs_fd.py NH3 cc-pVDZ --plot

python plot_step_size.py

data/step_size_h2o.csv was created by running ad_vs_fd.py in different step sizes (change line 173).

You can calculate each row using polyatomic.py. For example,

python polyatomic.py H2O STO-3G

You can calculate each row using ad_vs_fd.py. For example,

python ad_vs_fd.py H2O STO-3G