Python 3.7 script that uses networkx
this script is part of the public domain
CC0 1.0 Universal (CC0 1.0)
Author: Markus Penz (2021)

Scripts used in M. Penz and R. van Leeuwen, Density-functional theory on graphs, J. Chem. Phys. 155, 244111 (2021) (arxiv link)

fermion-graph.zip

defining a many-particle graph Hamiltonian with scalar_potential, peierls_phase, and interaction_potential
calculating eigensystem, including ground-state energy, density, and current
display graph and associated fermionic graph