Multi-Trace Deformations of AdS/CFT and Spherical D-branes

          @misc{ scivideos_PIRSA:09070009,
            doi = {10.48660/09070009},
            url = {https://pirsa.org/09070009},
            author = {Bernamonti, Alice},
            keywords = {Quantum Fields and Strings, Particle Physics, Cosmology},
            language = {en},
            title = {Multi-Trace Deformations of AdS/CFT and Spherical D-branes},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2009},
            month = {jul},
            note = {PIRSA:09070009 see, \url{https://scivideos.org/pirsa/09070009}}
          }
          

Abstract

It has been shown by Hertog and Horowitz that certain AdS boundary conditions allow non-singular initial conditions to evolve into a Big Crunch. To study this kind of cosmological singularities, one can use the dual quantum field theory, where the singularity is manifested by the presence of a multi-trace potential unbounded below. Recently, Craps, Hertog and Turok have proposed two specific models of this type to study the possibility of a Big Crunch/Big Bang transition. For both models, I will provide a D-brane interpretation of the unbounded potential. In particular, I will show that the AdS boundary conditions of interest cause spherical D-branes to be pushed to the boundary of AdS, and that the corresponding potential agrees with the multi-trace deformation of the boundary field theory