PIRSA:13010001

Video URL

https://pirsa.org/13010001

Superhorizon fluctuations in de Sitter and cosmological spacetimes

Pimentel, G. (2013). Superhorizon fluctuations in de Sitter and cosmological spacetimes. Perimeter Institute for Theoretical Physics. https://pirsa.org/13010001

Pimentel, Guilherme. Superhorizon fluctuations in de Sitter and cosmological spacetimes. Perimeter Institute for Theoretical Physics, Jan. 15, 2013, https://pirsa.org/13010001 

          @misc{ scivideos_PIRSA:13010001,
            doi = {10.48660/13010001},
            url = {https://pirsa.org/13010001},
            author = {Pimentel, Guilherme},
            keywords = {Quantum Fields and Strings, Cosmology},
            language = {en},
            title = {Superhorizon fluctuations in de Sitter and cosmological spacetimes},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2013},
            month = {jan},
            note = {PIRSA:13010001 see, \url{https://scivideos.org/pirsa/13010001}}
          }

Guilherme Pimentel Universiteit van Amsterdam

Talk numberPIRSA:13010001
DOI10.48660/13010001
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

I will discuss superhorizon fluctuations in de Sitter space. The first part of the talk will focus on computing entanglement entropies of field theories in a fixed de Sitter background. Those computations are done for free theories and also theories with gravity duals. If time permits, I will also discuss superhorizon fluctuations in cosmological backgrounds. In particular, I focus on showing that subhorizon fluctuations can not produce any significant backreaction on superhorizon modes. If those late time effects existed, one in principle could not trust the scale invariant spectrum of inflationary theories to be the source of the spectrum of thermal fluctuations of the CMB.