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Accelerating cosmology from Λ < 0 gravitational effective field theory Antonini, Stefano; Simidzija, Petar; Swingle, Brian; Van Raamsdonk, Mark, 1973-; Waddell, Chris

Abstract

A large class of Λ < 0 cosmologies have big-bang/big crunch spacetimes with time-symmetric backgrounds and asymptotically AdS Euclidean continuations suggesting a possible holographic realization. We argue that these models generically have time-dependent scalar fields, and these can lead to realistic cosmologies at the level of the homogeneous background geometry, with an accelerating phase prior to the turnaround and crunch. We first demonstrate via explicit effective field theory examples that models with an asymptotically AdS Euclidean continuation can also exhibit a period of accelerated expansion without fine tuning. We then show that certain significantly more tuned examples can give predictions arbitrarily close to a ΛCDM model. Finally, we demonstrate via an explicit construction that the potentials of interest can arise from a superpotential, thus suggesting that these solutions may be compatible with an underlying supersymmetric theory.

Item Metadata

Title
Accelerating cosmology from Λ < 0 gravitational effective field theory
Creator
Antonini, Stefano; Simidzija, Petar; Swingle, Brian; Van Raamsdonk, Mark, 1973-; Waddell, Chris
Publisher
Springer Berlin Heidelberg
Date Issued
2023-05-25
Description
A large class of Λ < 0 cosmologies have big-bang/big crunch spacetimes with time-symmetric backgrounds and asymptotically AdS Euclidean continuations suggesting a possible holographic realization. We argue that these models generically have time-dependent scalar fields, and these can lead to realistic cosmologies at the level of the homogeneous background geometry, with an accelerating phase prior to the turnaround and crunch. We first demonstrate via explicit effective field theory examples that models with an asymptotically AdS Euclidean continuation can also exhibit a period of accelerated expansion without fine tuning. We then show that certain significantly more tuned examples can give predictions arbitrarily close to a ΛCDM model. Finally, we demonstrate via an explicit construction that the potentials of interest can arise from a superpotential, thus suggesting that these solutions may be compatible with an underlying supersymmetric theory.
Subject
AdS-CFT Correspondence; Cosmological models; Effective Field Theories; Gauge-Gravity Correspondence
Genre
Article
Type
Text
Language
eng
Date Available
2023-09-05
Provider
Vancouver : University of British Columbia Library
Rights
Attribution 4.0 International (CC BY 4.0)
DOI
10.14288/1.0435748
URI
http://hdl.handle.net/2429/85802
Affiliation
Science, Faculty of; Non UBC; Physics and Astronomy, Department of
Citation
Antonini, S., Simidzija, P., Swingle, B. et al. Accelerating cosmology from Λ < 0 gravitational effective field theory. Journal of High Energy Physics. 2023, 203 (2023).
Publisher DOI
10.1007/JHEP05(2023)203
Peer Review Status
Reviewed
Scholarly Level
Faculty; Graduate
Copyright Holder
The Author(s)
Rights URI
http://creativecommons.org/licenses/by/4.0/
Aggregated Source Repository
DSpace

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Rights

Attribution 4.0 International (CC BY 4.0)