Theoretical High Energy Seminar – Niels Bohr Institute - University of Copenhagen

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Theoretical High Energy Seminar

Speaker: Martin Sloth, CERN

Title: Semiclassical relations and IR effects in de Sitter and slow-roll

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 discussed