Micromanaging and Accounting in de Sitter Holography

          @misc{ pirsa_PIRSA:11060053,
            doi = {10.48660/11060053},
            url = {https://pirsa.org/11060053},
            author = {Horn, Bart},
            keywords = {Cosmology},
            language = {en},
            title = {Micromanaging and Accounting in de Sitter Holography},
            publisher = {Perimeter Institute},
            year = {2011},
            month = {jun},
            note = {PIRSA:11060053 see, \url{https://pirsa.org}}
          }
          

Abstract

I will discuss recent work engineering "semi-holographic" constructions of de Sitter space in string theory, using elliptic fibrations and orientifolds to uplift known Freund-Rubin compactifications. The dual brane construction is compact and provides a microscopic realization of the dS/dS correspondence of Alishahiha et al., realizing de Sitter space in d dimensions as a warped compactification down to d-1 dimensional de Sitter space coupled to a pair of large N matter sectors. This provides a parametric microscopic accounting of the Gibbons-Hawking entropy. I will discuss an explicit example in three dimensions as well as ongoing work in four dimensions.