Accelerated Expansion and AdS/CFT


Hertog, T. (2012). Accelerated Expansion and AdS/CFT. Perimeter Institute. https://pirsa.org/12050004


Hertog, Thomas. Accelerated Expansion and AdS/CFT. Perimeter Institute, May. 01, 2012, https://pirsa.org/12050004


          @misc{ pirsa_PIRSA:12050004,
            doi = {10.48660/12050004},
            url = {https://pirsa.org/12050004},
            author = {Hertog, Thomas},
            keywords = {Cosmology},
            language = {en},
            title = {Accelerated Expansion and AdS/CFT},
            publisher = {Perimeter Institute},
            year = {2012},
            month = {may},
            note = {PIRSA:12050004 see, \url{https://pirsa.org}}

Thomas Hertog Katholieke Universiteit Leuven


We review the notion of a quantum state of the universe and its role in fundamental cosmology. Then we discuss recent work which points towards a profound connection, at the level of the quantum state, between (asymptotic) Euclidean AdS spaces and Lorentzian de Sitter spaces. This gives a new framework in which (a mild generalization of) AdS/CFT can be applied to inflationary cosmology.   For the specific case of the Hartle-Hawking no-boundary quantum state the ADS/ de Sitter connection yields a natural proposal for a more precise `dual' formulation of the wave function, in terms of field theories on the future de Sitter boundary that are certain relevant deformations of the CFTs that occur in AdS/CFT.