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

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Criteria for resolving the cosmological singularity in Infinite Derivative Gravity around expanding backgrounds. / Edholm, James; Conroy, Aindriú.

In: Physical Review D, Vol. 96, No. 11-12, 124040, 29.12.2017.

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@article{a733e2ea50084b3d95dba398b646c7b7,
title = "Criteria for resolving the cosmological singularity in Infinite Derivative Gravity around expanding backgrounds",
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.",
keywords = "gr-qc",
author = "James Edholm and Aindri{\'u} Conroy",
note = "{\textcopyright} 2017 American Physical Society",
year = "2017",
month = dec
day = "29",
doi = "10.1103/PhysRevD.96.124040",
language = "English",
volume = "96",
journal = "Physical Review D",
issn = "1550-7998",
publisher = "American Physical Society",
number = "11-12",

}

RIS

TY - JOUR

T1 - Criteria for resolving the cosmological singularity in Infinite Derivative Gravity around expanding backgrounds

AU - Edholm, James

AU - Conroy, Aindriú

N1 - © 2017 American Physical Society

PY - 2017/12/29

Y1 - 2017/12/29

N2 - 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.

AB - 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.

KW - gr-qc

U2 - 10.1103/PhysRevD.96.124040

DO - 10.1103/PhysRevD.96.124040

M3 - Journal article

VL - 96

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 11-12

M1 - 124040

ER -