MANY-BODY THEORY
Academic Year 2015/2016 - 2° Year - Curriculum FISICA TEORICA
Teaching Staff: G. G. N. ANGILELLA
Credit Value: 6
Scientific field: FIS/03 - Physics of matter
Taught classes: 48 hours
Term / Semester: 1°
Credit Value: 6
Scientific field: FIS/03 - Physics of matter
Taught classes: 48 hours
Term / Semester: 1°
Detailed Course Content
Second quantization. Degenerate electron gas. Photons and phonons. Green functions at T = 0. Their analytical properties and Lehmann representation. Wick's theorem. Perturbation theory. Feynman diagrams. Self-energy. Dyson equation. Hartree-Fock approximation. Renormalization: concept of quasiparticle. Microscopical foundations of Landay theory of Fermi liquids. Polarizability and density-density correlation function. RPA. Interaction with an external potential.