Out of Equilibrium Quantum Field Theory --- Perturbation Theory and Generalized Boltzmann Equation

Details Out of Equilibrium Quantum Field Theory --- Perturbation Theory and Generalized Boltzmann Equation Out of Equilibrium Quantum Field Theory --- Perturbation Theory and Generalized Boltzmann Equation

1999-05-13

arxiv.org/abs/hep-th/9905090v1

Prog.Theor.Phys. 102 (1999) 1-27

Physics

High Energy Physics

High Energy Physics - Theory

34pages

Scientific paper

10.1143/PTP.102.1

This paper describes perturbative framework, on the basis of the closed-time-path formalism, in terms of quasiparticle picture for studying quasiuniform relativistic quantum field systems near equilibrium and nonequilibrium quasistationary systems. Two calculational schemes are introduced, the one is formulated on the basis of the initial-particle distribution function and the one is formulated on the basis of the ``physical''-particle distribution function. It is shown that both schemes are equivalent and lead to a generalized kinetic or Boltzmann equation. Concrete procedure of computing a generic amplitude is presented.

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