Kinetic versus thermal-field-theory approach to cosmological perturbations.

@article{Rebhan1994KineticVT,
  title={Kinetic versus thermal-field-theory approach to cosmological perturbations.},
  author={Rebhan and Schwarz},
  journal={Physical review. D, Particles and fields},
  year={1994},
  volume={50 4},
  pages={
          2541-2559
        }
}
  • Rebhan, Schwarz
  • Published 1994
  • Physics, Medicine
  • Physical review. D, Particles and fields
A closed set of equations for the evolution of linear perturbations of homogeneous, isotropic cosmological models can be obtained in various ways. The simplest approach is to assume a macroscopic equation of state, e.g., that of a perfect fluid. For a more refined description of the early Universe, a microscopic treatment is required. The purpose of this paper is to compare the approach based on classical kinetic theory to the more recent thermal-field-theory approach. It is shown that in the… Expand
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