I've read the story a few times before, but am thankful for the reposting because I've actually been trying to figure out how to build a quantum physics simulat

I've read the story a few times before, but am thankful for the reposting because I've actually been trying to figure out how to build a quantum physics simulator and was most recently stuck on how field interactions / Feynman diagrams came into play. Lo and behold the snippet on path integrals around the lattice, from Feynman himself solving the same problem!