PIRSA:10060013 Conference Quantum Fields and Strings

DOI10.48660/10060013

Conference/School: Cosmological Frontiers in Fundamental Physics - 2010

Skenderis, K. (2010). Holographic Non-Gaussianity. Perimeter Institute. https://pirsa.org/10060013

Skenderis, Kostas. Holographic Non-Gaussianity. Perimeter Institute, Jun. 15, 2010, https://pirsa.org/10060013 

@misc{ pirsa_PIRSA:10060013,
  doi = {10.48660/10060013},
  url = {https://pirsa.org/10060013},
  author = {Skenderis, Kostas},
  keywords = {Quantum Fields and Strings},
  language = {en},
  title = {Holographic Non-Gaussianity},
  publisher = {Perimeter Institute},
  year = {2010},
  month = {jun},
  note = {PIRSA:10060013 see, \url{https://pirsa.org}}
}

Abstract

We discuss holographic models for the inflationary epoch. We show how cosmological observables such as the primordial spectrum and non-Gaussianities can be computed via computations of correlation functions of a dual three dimensional QFT (without gravity!) We present a general class of models that have the following universal features: (i) they have a nearly scale invariant spectrum of small amplitude primordial fluctuations, (ii) the scalar spectral index runs as alpha_s = - (n_s-1), (iii) the three point function of density perturbations is exactly equal to the sum of the local and equilateral form with f_{NL}^{local} = 6 f_{NL}^{equil} = 20/3.

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