33. Schwinger-Keldysh: information carried by Keldysh Green’s functions (nonequilibrium diagrammatic methods 1)
I discuss information carried by Keldysh Green’s functions in the non-equilibrium quantum field theory.
31. Schwinger-Keldysh: brief review (Nonequilibrium diagrammatic methods 1)
I briefly discuss what physical problems require the use of non-equilibrium diagr. QFT methods. I also review the structure of Green functions in SK formalism.