Diagonalization of full finite temperature Green's function by quasi-particles

Abstract

For thermal systems, standard perturbation theory breaks down because of the absence of stable, observable asymptotic states. We show, how the introduction of {\it statistical} quasi-particles (stable, but not observable) gives rise to a consistent description. Statistical and spectral information can be cleanly separated also for interacting systems.

9 pages in standard LaTeX

Cited by in corpus (6)

• Transformations of real-time finite-temperature Feynman rules
• A Transport Equation for Quantum Fields with Continuous Mass Spectrum
• The Delta-Hole model at Finite Temperature
• The column vector calculus for Thermo Field Dynamics of relativistic quantum fields
• Thermo Field Dynamics and Kinetic Coefficients of a Charged Boson Gas
• Comment on the diagonalization of Green functions