Back Reaction of Cosmological Perturbations

@article{Brandenberger2000BackRO,
  title={Back Reaction of Cosmological Perturbations},
  author={Robert Brandenberger},
  journal={arXiv: High Energy Physics - Theory},
  year={2000},
  pages={198-206}
}
  • R. Brandenberger
  • Published 4 April 2000
  • Physics
  • arXiv: High Energy Physics - Theory
The presence of cosmological perturbations affects the background metric and matter configuration in which the perturbations propagate. This effect, studied a long time ago for gravitational waves, also is operational for scalar gravitational fluctuations, inhomogeneities which are believed to be more important in inflationary cosmology. The back-reaction of fluctuations can be described by an effective energy-momentum tensor. The issue of coordinate invariance makes the analysis more… 

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