PIRSA:13100070

Video URL

https://pirsa.org/13100070

Conformal symmetry and cosmology

Joyce, A. (2013). Conformal symmetry and cosmology. Perimeter Institute for Theoretical Physics. https://pirsa.org/13100070

Joyce, Austin. Conformal symmetry and cosmology. Perimeter Institute for Theoretical Physics, Oct. 22, 2013, https://pirsa.org/13100070 

          @misc{ scivideos_PIRSA:13100070,
            doi = {10.48660/13100070},
            url = {https://pirsa.org/13100070},
            author = {Joyce, Austin},
            keywords = {Cosmology},
            language = {en},
            title = {Conformal symmetry and cosmology},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2013},
            month = {oct},
            note = {PIRSA:13100070 see, \url{https://scivideos.org/pirsa/13100070}}
          }

Austin Joyce University of Chicago

Talk numberPIRSA:13100070
DOI10.48660/13100070
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

We will explore the role that conformal symmetries may play in cosmology. First, we will discuss  the symmetries underlying the statistics of the primordial perturbations which seeded the temperature anisotropies of the Cosmic Microwave Background. I will show how symmetry considerations lead us to three broad classes of theories to explain these perturbations: single-field inflation, multi-field inflation, and the conformal mechanism. We will discuss the symmetries in each case and derive their model-independent consequences. Finally, we will examine the possibility of violating the null energy condition with a well-behaved quantum field theory.