The Hamiltonian in the Nambu Representation and the Role of the Hartree–Fock–BCS Self-Energy
Abstract
This chapter introduces the Nambu representation for the pseudo-spinor fields and expresses the system Hamiltonian in terms of them. In this way, the anomalous single-particle Green’s function is made to match the form of the single-particle Green’s functions treated in Part I, where an even number of creation and destruction operators appear. On physical grounds, this approach exploits the fact that opposite-spin fermions are coupled in pairs. The special role played by the Hartree–Fock self-energy for a superfluid Fermi system is duly emphasized.
Fields of Study & Subjects
Physics of Superconductivity and Magnetism
Nuclear physics research studies
Quantum many-body systems
Publication details
- Journal / source
- Cambridge University Press eBooks
- Pages
- 167–175
- Publication date
- 6 February 2026
- Document type
- Book chapter