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

Research output: Contribution to journalJournal article

Article number124040
<mark>Journal publication date</mark>29/12/2017
<mark>Journal</mark>Physical Review D
Issue number11-12
Number of pages6
Publication StatusPublished
<mark>Original language</mark>English


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.

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© 2017 American Physical Society