260084 VU Feynman diagrams empowered by Monte Carlo (2023S)

The basics of the perturbation expansion of Green and correlation functions to Feynman diagrams is overlaid with practical exercises. The target of exercises, evolving from trivial exactly solvable models to contemporary edge of precise many-body computational methods, is to develop practical skills in Diagrammatic Monte Carlo method and reach the level of competency sufficient for exact solving of exciton, polaron, and spin-boson models. Final introduction to the novel Bold Diagrammatic Monte Carlo method presents detailed recipes not yet covered by existing tutorial literature.