Criteria for resolving the cosmological singularity in Infinite Derivative Gravity around expanding backgrounds

Edholm, James and Conroy, Aindriú (2017) Criteria for resolving the cosmological singularity in Infinite Derivative Gravity around expanding backgrounds. Physical Review D, 96 (11-12). ISSN 1550-7998

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Abstract

We derive the conditions whereby null rays `defocus' within Infinite Derivative Gravity for perturbations around an (A)dS background, and show that it is therefore possible to avoid singularities within this framework. This is in contrast to Einstein's theory of General Relativity. We further extend this to an (A)dS-Bianchi I background metric, and also give an example of a specific perturbation where defocusing is possible given certain conditions.

Item Type: Journal Article
Journal or Publication Title: Physical Review D
Additional Information: © 2017 American Physical Society
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 89210
Deposited By: ep_importer_pure
Deposited On: 20 Dec 2017 14:16
Refereed?: Yes
Published?: Published
Last Modified: 21 Feb 2020 03:50
URI: https://eprints.lancs.ac.uk/id/eprint/89210

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