Quantum Theory of Condensed Matter II


Lecture details

The summer semester is held as a digital semester. In principle, as agreed by the universities in North Rhine-Westphalia, all courses that can be offered remotely will take place online for the entire summer semester.

The lecture will be given by Prof. Schoeller.


This course is a continuation of the course on "Quantum Theory of Condensed Matter I". It contains the following subjects:

  • electrons and phonons: screening properties, effective phonon propagators and quasiparticle life-time
  • BCS-superconductivity: BCS model, BCS theory, mean-field theory, transverse electromagnetic fields
  • Collective magnetism of insulators: Heisenberg model, mean-field theory, spin wave theory
  • Collective magnetism of metals: spin density waves, Ferromagnetism, Antiferromagnetism
  • Superfluidity: Bose-Einstein condensation, mean-field theory
  • Disorder: metals and superconductors,
  • Linear transport theory: Kubo formula, disorder, conductivity, linear Boltzmann equations, weak localization
  • Introduction to path integral methods


Quantum Theory of Condensed Matter I: second quantization, quantum decay theory, basic knowledge about electrons and phonons, Jellium model, longitudinal acoustic phonons in continuum theory, Green's functions and correlation functions, Kubo formalism, Matsubara Green's functions, self-energy, Wick's theorem and Feynman diagrams, dielectric function and screening theory, Fermi liquid theory

Time Room Start/Finish
Thurs. 8.30am -10am N/A 09.04.2020 - 16.07.2020
Fri. 8.30am -10am N/A 17.04.2020 - 17.07.2020
Fri. 10.30am -12pm N/A 17.04.2020 - 17.07.2020