PIRSA:16030085 Scientific Series Quantum Fields and Strings

DOI10.48660/16030085

Series: Quantum Fields and Strings

Schillo, M. (2016). Cosmological singularities in holography. Perimeter Institute. https://pirsa.org/16030085

Schillo, Marjorie. Cosmological singularities in holography. Perimeter Institute, Mar. 15, 2016, https://pirsa.org/16030085 

@misc{ pirsa_PIRSA:16030085,
  doi = {10.48660/16030085},
  url = {https://pirsa.org/16030085},
  author = {Schillo, Marjorie},
  keywords = {Quantum Fields and Strings},
  language = {en},
  title = {Cosmological singularities in holography},
  publisher = {Perimeter Institute},
  year = {2016},
  month = {mar},
  note = {PIRSA:16030085 see, \url{https://pirsa.org}}
}

Abstract

I will discuss recent work on big crunch singularities produced in asymptotic AdS cosmologies using gauge/gravity duality. The dual description consists of a constant mass deformation of ABJM theory on de Sitter space and is well-defined and stable for small deformations.

  There is a critical deformation where the theory becomes unstable at weak and at strong coupling. I will discuss a field theory diagnostic of this instability as well as boundary two-point correlators calculated via the geodesic approximation. Near the critical deformation a second saddle point contribution enters, in which the spacelike geodesics probe the high curvature region near the singularity. Its contribution strongly enhances the long-distance correlations. This has a natural interpretation in the weakly coupled boundary theory where the critical point corresponds to a massless limit.

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