PIRSA:10100075 Conference Cosmology

DOI10.48660/10100075

Conference/School: IR issues and loops in de Sitter space - 2010

Sloth, M. (2010). Semiclassical approaches to IR issues in quasi de Sitter universes . Perimeter Institute. https://pirsa.org/10100075

Sloth, Martin. Semiclassical approaches to IR issues in quasi de Sitter universes . Perimeter Institute, Oct. 29, 2010, https://pirsa.org/10100075 

@misc{ pirsa_PIRSA:10100075,
  doi = {10.48660/10100075},
  url = {https://pirsa.org/10100075},
  author = {Sloth, Martin},
  keywords = {Cosmology},
  language = {en},
  title = {Semiclassical approaches to IR issues in quasi de Sitter universes },
  publisher = {Perimeter Institute},
  year = {2010},
  month = {oct},
  note = {PIRSA:10100075 see, \url{https://pirsa.org}}
}

Abstract

Using simple semiclassical relations it is possible to show that the conventional cosmological correlation functions are affected by significant IR corrections in quasi de Sitter space-times when averaged over very large volumes (in the "large box"). The IR effects apparently imply a breakdown of perturbation theory in the large box on sufficiently long time scales, for example the time between self-reproduction and reheating in chaotic inflation. An interpretation of the apparent breakdown of the perturbative expansion of gravity will also be briefly discussed.

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