Rights statement: ©2017 American Physical Society.
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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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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 -