PIRSA:14100051

De Sitter Wavefunctionals and the Resummation of Time

Baumgart, M. (2014). De Sitter Wavefunctionals and the Resummation of Time. Perimeter Institute. https://pirsa.org/14100051

Baumgart, Matthew. De Sitter Wavefunctionals and the Resummation of Time. Perimeter Institute, Oct. 07, 2014, https://pirsa.org/14100051 

          @misc{ pirsa_PIRSA:14100051,
            doi = {10.48660/14100051},
            url = {https://pirsa.org/14100051},
            author = {Baumgart, Matthew},
            keywords = {Particle Physics},
            language = {en},
            title = {De Sitter Wavefunctionals and the Resummation of Time},
            publisher = {Perimeter Institute},
            year = {2014},
            month = {oct},
            note = {PIRSA:14100051 see, \url{https://pirsa.org}}
          }

Matthew Baumgart Carnegie Mellon University

DOI 10.48660/14100051
Collection
Talk Type Scientific Series
Subject

Abstract

The holographic RG of Anti-De Sitter gives a powerful clue about the underlying AdS/CFT correspondence. The question is whether similar hints can be found for the heretofore elusive holographic dual of De Sitter. The framework of stochastic inflation uses nonperturbative insight to tame bad behavior in the perturbation series of a massless scalar in DS at late times. Remarkably, this fully quantum system loses phase information in the leading approximation, but retains a probabilistic character and allows for a controlled prediction of late time Green's functions. Recasting this as a "resummation of time", we wish understand whether the distributions that result can be thought of as an attractive UV fixed point of a theory
living on a spacelike slice of DS. We derive stochastic inflation via the wavefunctional approach to Quantum Field Theory. This allows for the straightforward implementation of corrections to the original framework.