In recent months, the possibility of a dS/CFT correspondence, analogous to the famous AdS/CFT correspondence, was discussed here several times. It was announced at Strings 2011 that a realization of dS/CFT has been discovered and that a paper would be coming out last month. Now, at the end of August, it has finally arrived:(adsbygoogle = window.adsbygoogle || []).push({});

http://arxiv.org/abs/1108.5735

Higher Spin Realization of the dS/CFT Correspondence

Authors: Dionysios Anninos, Thomas Hartman, Andrew Strominger

Abstract: We conjecture that Vasiliev's theory of higher spin gravity in four-dimensional de Sitter space (dS) is holographically dual to a three-dimensional conformal field theory (CFT) living on the spacelike boundary of dS at future timelike infinity. The CFT is the Euclidean Sp(N) vector model with anticommuting scalars. The free CFT flows under a double-trace deformation to an interacting CFT in the IR. We argue that both CFTs are dual to Vasiliev dS gravity but with different future boundary conditions on the bulk scalar field. Our analysis rests heavily on analytic continuations of bulk and boundary correlators in the proposed duality relating the O(N) model with Vasiliev gravity in AdS.

Perhaps the first order of business for anyone wanting to understand the paper, is to understand why the dual CFT lives on thefutureboundary, rather than the past boundary or some combination of the two.

Coincidentally, the day also brings http://arxiv.org/abs/1108.5921" [Broken]. Of course the latter doesn't have an "uplifted CFT" to go with the constructed de Sitter solution, but that must be on the agenda now.

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# Dawn of the dS/CFT

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