Course

Renormalization group flow, Renormalization of massive φ4 theory at one loop

Electron-phonon interactions, Schrieffer-Wolff transformation

Renormalization of massless φ4 theory at one loop, Beta function

Classical description of phonons, quantum theory of phonons, Debye model

Effective action at one loop, Mass renormalization in φ4 theory

Jellium model, Hartree and Fock terms, density of states, jellium oscillations and Einstein phonons

Generating functionals

Perturbation theory for nearly-free electrons, Peierl's theorem, electron-electron interactions, jellium model

Cancelation of vacuum diagrams, Structure of perturbation theory