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  • IDGPotentialaroundexpandingbackgroundPRL

    Rights statement: © 2018 American Physical Society

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Revealing infinite derivative gravity's true potential: The weak-field limit around de Sitter backgrounds

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Revealing infinite derivative gravity's true potential : The weak-field limit around de Sitter backgrounds. / Edholm, James.

In: Physical Review D, Vol. 97, No. 6, 064011, 15.03.2018.

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@article{aa60dd77ec6048a78fae6491e5e85593,
title = "Revealing infinite derivative gravity's true potential: The weak-field limit around de Sitter backgrounds",
abstract = "General Relativity is known to produce singularities in the potential generated by a point source. Our universe can be modelled as a de Sitter (dS) metric and we show that ghost-free Infinite Derivative Gravity (IDG) produces a non-singular potential around a dS background, while returning to the GR prediction at large distances. We also show that although there are an apparently infinite number of coefficients in the theory, only a finite number actually affect the predictions. By writing the linearised equations of motion in a simplified form, we find that at distances below the Hubble length scale, the difference between the IDG potential around a flat background and around a de Sitter background is negligible.",
author = "James Edholm",
note = "{\textcopyright} 2018 American Physical Society",
year = "2018",
month = mar
day = "15",
doi = "10.1103/PhysRevD.97.064011",
language = "English",
volume = "97",
journal = "Physical Review D",
issn = "1550-7998",
publisher = "American Physical Society",
number = "6",

}

RIS

TY - JOUR

T1 - Revealing infinite derivative gravity's true potential

T2 - The weak-field limit around de Sitter backgrounds

AU - Edholm, James

N1 - © 2018 American Physical Society

PY - 2018/3/15

Y1 - 2018/3/15

N2 - General Relativity is known to produce singularities in the potential generated by a point source. Our universe can be modelled as a de Sitter (dS) metric and we show that ghost-free Infinite Derivative Gravity (IDG) produces a non-singular potential around a dS background, while returning to the GR prediction at large distances. We also show that although there are an apparently infinite number of coefficients in the theory, only a finite number actually affect the predictions. By writing the linearised equations of motion in a simplified form, we find that at distances below the Hubble length scale, the difference between the IDG potential around a flat background and around a de Sitter background is negligible.

AB - General Relativity is known to produce singularities in the potential generated by a point source. Our universe can be modelled as a de Sitter (dS) metric and we show that ghost-free Infinite Derivative Gravity (IDG) produces a non-singular potential around a dS background, while returning to the GR prediction at large distances. We also show that although there are an apparently infinite number of coefficients in the theory, only a finite number actually affect the predictions. By writing the linearised equations of motion in a simplified form, we find that at distances below the Hubble length scale, the difference between the IDG potential around a flat background and around a de Sitter background is negligible.

U2 - 10.1103/PhysRevD.97.064011

DO - 10.1103/PhysRevD.97.064011

M3 - Journal article

VL - 97

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 6

M1 - 064011

ER -