PIRSA:13010001

Superhorizon fluctuations in de Sitter and cosmological spacetimes

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

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

          @misc{ pirsa_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},
            year = {2013},
            month = {jan},
            note = {PIRSA:13010001 see, \url{https://pirsa.org}}
          }

Guilherme Pimentel

Universiteit van Amsterdam

Talk number
PIRSA:13010001
Collection
Talk Type
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.