Kubo–Martin–Schwinger Boundary Conditions
Abstract
This chapter considers the boundary conditions on the time variables z ₁ and z ₂ for the contour single-particle Green’s function, which run over a generic contour in the complex-time z -plane. Different contours of interest are then specified. The boundary conditions for the integral form of the Dyson equation are also considered.
Fields of Study & Subjects
Spectral Theory in Mathematical Physics
Quantum many-body systems
Quantum and Classical Electrodynamics
Publication details
- Journal / source
- Cambridge University Press eBooks
- Pages
- 77–82
- Publication date
- 6 February 2026
- Document type
- Book chapter