PIRSA:10100075

Semiclassical approaches to IR issues in quasi de Sitter universes

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}}
          }

Martin Sloth University of Southern Denmark

DOI 10.48660/10100075
Collection
Talk Type Conference
Subject

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.