Realization of de Sitter spacetime in AdS/CFT
Abstract
We construct horizonless, everywhere-regular solitons containing a de~Sitter core inside an asymptotically anti--de~Sitter spacetime, using an ordinary action of Einstein gravity, a Maxwell field, and a charged scalar. The object is a gravitating gauged Q-ball whose false-vacuum interior acts as a positive effective cosmological constant, sourcing an inner de~Sitter region joined through a thin wall to a charged, asymptotically AdS exterior. Two general requirements are emphasized: the scalar must lie in a near-false-vacuum (slow-roll--like) regime, and the exterior is driven to the extremal Reissner--Nordström--AdS locus in the thin-wall limit, in which the wall approaches the common would-be horizon. Since the solution is static and spherically symmetric, it may correspond to a semiclassical charge-Q state of the dual CFT, realizing de~Sitter space approximately within a holographic theory. We also discuss free fluctuations whose de~Sitter--core modes appear as parametrically low-lying excitations above the state, bulk reconstruction, and the near-extremal regime, where finite-𝒩 effects are expected to cut off the formal classical throat and replace its independent free-field modes by an interacting near-throat sector.
Related
- Nonoscillatory gravitational quasinormal modes of Reissner–Nordström–de Sitter spacetime
- Three-gluon scattering amplitude in de Sitter spacetime
- Chiral symmetry and curvature bounds in de Sitter spacetime
- dSIBP: a package for generating IBP seeds for QFT in de Sitter spacetime
- de Sitter Spacetime: Geometry, Causal Structure, and Quantum Fields
BibTeX
@misc{koga2026realization,
title = {{Realization of de Sitter spacetime in AdS/CFT}},
author = {Yasutaka Koga and Keiju Murata and Seiji Terashima},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.27246},
eprint = {2610.27246},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.27246},
}
RIS
TY - UNPB
TI - Realization of de Sitter spacetime in AdS/CFT
AU - Yasutaka Koga
AU - Keiju Murata
AU - Seiji Terashima
PY - 2026
DA - 2026/10/19
PB - arXiv
DO - 10.48550/arxiv.2610.27246
UR - https://arxiv.org/abs/2610.27246
AB - We construct horizonless, everywhere-regular solitons containing a de~Sitter core inside an asymptotically anti--de~Sitter spacetime, using an ordinary action of Einstein gravity, a Maxwell field, and a charged scalar. The object is a gravitating gauged Q-ball whose false-vacuum interior acts as a positive effective cosmological constant, sourcing an inner de~Sitter region joined through a thin wall to a charged, asymptotically AdS exterior. Two general requirements are emphasized: the scalar must lie in a near-false-vacuum (slow-roll--like) regime, and the exterior is driven to the extremal Reissner--Nordström--AdS locus in the thin-wall limit, in which the wall approaches the common would-be horizon. Since the solution is static and spherically symmetric, it may correspond to a semiclassical charge-Q state of the dual CFT, realizing de~Sitter space approximately within a holographic theory. We also discuss free fluctuations whose de~Sitter--core modes appear as parametrically low-lying excitations above the state, bulk reconstruction, and the near-extremal regime, where finite-𝒩 effects are expected to cut off the formal classical throat and replace its independent free-field modes by an interacting near-throat sector.
ER -