PIRSA:12120014

Nonlinear Extensions for the Inflationary Power Spectra

Miao, S. (2012). Nonlinear Extensions for the Inflationary Power Spectra. Perimeter Institute. https://pirsa.org/12120014

Miao, Shun-Pei. Nonlinear Extensions for the Inflationary Power Spectra. Perimeter Institute, Dec. 11, 2012, https://pirsa.org/12120014 

          @misc{ pirsa_PIRSA:12120014,
            doi = {10.48660/12120014},
            url = {https://pirsa.org/12120014},
            author = {Miao, Shun-Pei},
            keywords = {Cosmology},
            language = {en},
            title = {Nonlinear Extensions for the Inflationary Power Spectra},
            publisher = {Perimeter Institute},
            year = {2012},
            month = {dec},
            note = {PIRSA:12120014 see, \url{https://pirsa.org}}
          }

Shun-Pei Miao

Utrecht University

Talk number
PIRSA:12120014
Collection
Talk Type
Subject
Abstract
We expound several principles in an attempt to clarify the debate over infrared loop corrections to the primordial scalar and tensor power spectra from inflation. Among other things we note that existing proposals for nonlinear extensions of the scalar fluctuation field $\zeta$ introduce new ultraviolet divergences which no one understands how to renormalize. Loop corrections and higher correlators of these putative observables would also be enhanced by inverse powers of the slow roll parameter $\epsilon$. We propose an extension which might be better behaved.