Field-theoretic

Green's functions

Single- and many-particle propagators — the central objects that carry spectra, lifetimes, and response.

Every topic that uses this method, drawn from across all subjects.

• The Hubbard Model Mott Physics in Correlated Lattices The minimal model of reference for the cuprates — one hopping amplitude and one on-site repulsion — together with its particle–hole symmetry, Green's functions, and the two limits (atomic and non-interacting) that already reveal the Mott insulator.