Entangled universes in dS wedge holography

• Published in: The journal of high energy physics Vol. 2023; no. 10; pp. 156 - 41
• Main Authors: Aguilar-Gutierrez, Sergio E., Patra, Ayan K., Pedraza, Juan F.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 25.10.2023; Springer Nature B.V; SpringerOpen
• Subjects: AdS-CFT Correspondence; Black holes; Branes; Classical and Quantum Gravitation; Complexity; Cosmological models; de Sitter space; Elementary Particles; Entropy; Gravity; High energy physics; Holography; Physics; Physics and Astronomy; Proposals; Quantum entanglement; Quantum Field Theories; Quantum Field Theory; Quantum phenomena; Quantum Physics; Radiation; Regular Article - Theoretical Physics; Relativity Theory; Spacetime; String Theory; Universe; AdS-CFT Correspondence; Cosmological models; de Sitter space
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP10(2023)156

A bstract We develop a new setting in the framework of braneworld holography to describe a pair of coupled and entangled uniformly accelerated universes. The model consists of two branes embedded into AdS space capping off the UV and IR regions, giving rise to a notion of dS wedge holography. Specializing in a three-dimensional bulk, we show that dS JT gravity can emerge as an effective braneworld theory, provided that fluctuations transverse to the branes are included. We study the holographic entanglement entropy between the branes as well as the holographic complexity within the ‘complexity=anything’ proposal. We reproduce a Page curve with respect to an observer collecting radiation on the UV brane, as long as we take the limit where gravity decouples in that universe, thus acting as a non-gravitating bath. The Page curve emerges due to momentum-space (UV/IR) entanglement and can be understood as analogous to the ‘confinement-deconfinement’ transition in theories with a mass gap. Moreover, the analysis of complexity shows that the hyperfast growth phenomenon is displayed within a set of proposals, while late-time linear growth can be recovered for a different set. Our framework thus provides new test grounds for understanding quantum information concepts in dS space and dS holography.