Before the Bang


Sundrum, R. (2014). Before the Bang. Perimeter Institute. https://pirsa.org/14030113


Sundrum, Raman. Before the Bang. Perimeter Institute, Mar. 18, 2014, https://pirsa.org/14030113


          @misc{ pirsa_PIRSA:14030113,
            doi = {10.48660/14030113},
            url = {https://pirsa.org/14030113},
            author = {Sundrum, Raman},
            keywords = {Particle Physics},
            language = {en},
            title = {Before the Bang},
            publisher = {Perimeter Institute},
            year = {2014},
            month = {mar},
            note = {PIRSA:14030113 see, \url{https://pirsa.org}}

Raman Sundrum University of Maryland, College Park

Talk Type Scientific Series


The simplest black hole solution in asymptotic AdS spacetime, the eternal 3-dimensional BTZ black hole, is studied from the viewpoint of AdS/CFT duality. We identify a class of non-local correlators on the CFT side that allow us to generalize the notion of quantum gravity "S-matrix" to scattering inside the horizon. Since the interior of the horizon is a cosmological spacetime with a big bang/crunch-like singularity, our construction can be interpreted as identifying generally coordinate invariant observables of quantum gravity in a simple cosmology. We show in a certain precise sense, that these holographic observables lie "before the big bang" in a region of spacetime containing closed timelike curves. A central tool in our analysis is the realization of BTZ as a quotient of 3-dimensional AdS.