Video URL
https://pirsa.org/16030085Cosmological singularities in holography
APA
Schillo, M. (2016). Cosmological singularities in holography. Perimeter Institute for Theoretical Physics. https://pirsa.org/16030085
MLA
Schillo, Marjorie. Cosmological singularities in holography. Perimeter Institute for Theoretical Physics, Mar. 15, 2016, https://pirsa.org/16030085
BibTex
@misc{ scivideos_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 for Theoretical Physics}, year = {2016}, month = {mar}, note = {PIRSA:16030085 see, \url{https://scivideos.org/index.php/pirsa/16030085}} }
Marjorie Schillo Katholieke Universiteit Leuven
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.