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abstract

A holographic duality is proposed relating quantum gravity on dS_D (D-dimensional de Sitter space) to conformal field theory on a single S^{D-1} ((D-1)-sphere), in which bulk de Sitter correlators with points on the boundary are related to CFT correlators on the sphere, and points on I^+ (the future boundary of dS_D) are mapped to the antipodal points on S^{D-1} relative to those on I^-. For the case of dS_3, which is analyzed in some detail, the central charge of the CFT_2 is computed in an analysis of the asymptotic symmetry group at I^\pm. This dS/CFT proposal is supported by the computation of correlation functions of a massive scalar field. In general the dual CFT may be non-unitary and (if for example there are sufficently massive stable scalars) contain complex conformal weights. We also consider the physical region O^- of dS_3 corresponding to the causal past of a timelike observer, whose holographic dual lives on a plane rather than a sphere. O^- can be foliated by asymptotically flat spacelike slices. Time evolution along these slices is generated by L_0+\bar L_0, and is dual to scale transformations in the boundary CFT_2.

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representative citing papers

Holographic Banners

hep-th · 2026-04-02 · unverdicted · novelty 8.0

Holographic banners are four-argument on-shell actions that map thermofield double boundary states to future interior semiclassical states and yield BKL mixing timescales in AdS black holes.

dS$^4$ Metamorphosis

hep-th · 2026-02-23 · conditional · novelty 7.0

Higher spin gravity path integral on S^4 glues to an Sp(N) or superconformal S^3 boundary theory, giving leading contribution 2^N with one-loop cancellations.

M\"obius randomness in the Hartle-Hawking state

hep-th · 2025-05-05 · unverdicted · novelty 7.0

The Hartle-Hawking state for toroidal quantum cosmologies is expressed in the Langlands decomposition as a sum over zeta zeros whose near-singularity dynamics follow the Hilbert-Pólya Hamiltonian and as a Möbius average of CFT partition functions.

No boundary density matrix in elliptic de Sitter dS/$\mathbb{Z}_2$

hep-th · 2025-11-30 · unverdicted · novelty 6.0

The Euclidean path integral on elliptic de Sitter defines a no-boundary density matrix whose entropies reduce to vertex operator correlators on non-orientable surfaces, with a one-dimensional global Hilbert space but nontrivial observer Fock spaces.

Towards a microscopic description of de Sitter dynamics

hep-th · 2025-06-02 · unverdicted · novelty 6.0

An SYK-based quantum system reproduces semiclassical correlators of quantum fields in rigid de Sitter space and non-trivial OTOC features including a doubled Lyapunov exponent.

3D near-de Sitter gravity and the soft mode of DSSYK

hep-th · 2026-04-22 · unverdicted · novelty 6.0

The soft mode of DSSYK is dual to 3D near-de Sitter gravity with a localized dS2 slice, where effective actions, entropies, and correlators match via conformal boundary conditions on future and past infinity.

More on Bulk Local State Reconstruction in Flat/Carr CFT

hep-th · 2026-03-12 · unverdicted · novelty 5.0

Bulk local states are built in flat holography via induced representations, with a dual basis resolving 3D bra-ket scaling issues and a tilde basis enabling explicit constructions in higher dimensions that recover the massive propagator.

A Compact Story of Positivity in de Sitter

hep-th · 2025-08-11 · unverdicted · novelty 5.0

Compares two methods to resolve disagreements and prove positivity of anomalous dimensions for principal series fields coupled to compact scalar operators in de Sitter space.

3d QFT IR divergences as UV divergences in 4d Holographic Cosmology

hep-th · 2026-05-15 · unverdicted · novelty 4.0

In a 3d toy model for holographic cosmology, a mass term preserving generalized conformal structure permits 2-loop computations that indicate possible IR finiteness beyond perturbation theory, corresponding to UV finiteness without singularities in the 4d dual.

Dark energy from string theory: an introductory review

hep-th · 2026-03-26 · unverdicted · novelty 2.0

String theory imposes constraints on dark energy but permits various construction attempts for de Sitter vacua and single-field exponential quintessence models despite obstructions.

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