(05.02.) Holograms in the Sky from Euclidean AdS
Charlotte Sleight (Durham University)
05.02.2026 at 16:15
The AdS/CFT correspondence is our most successful working example of the holographic principle, identifying quantum gravity in anti-de Sitter space with a non-gravitational conformal field theory in one dimension lower. In this talk I will discuss how far lessons from AdS/CFT can be pushed towards settings closer to our universe, taking anti-de Sitter’s maximally symmetric cousins, de Sitter and Minkowski space, as a starting point. A key hurdle for holography in these settings is that the physics involves outgoing radiation. I will review results showing that perturbative correlation functions at de Sitter future infinity, and on the celestial sphere of Minkowski space, can nevertheless be expressed as boundary correlators in Euclidean AdS. This Euclidean perspective provides a concrete bridge between radiative observables and familiar AdS technology, and it helps clarify which structural features of AdS/CFT persist, and which require modification, when one moves beyond the AdS setting.
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