Home > Research > Publications & Outputs > Infinite Derivative Gravity

Electronic data

  • 2019edholmphd

    Final published version, 1.45 MB, PDF document

    Available under license: CC BY-ND: Creative Commons Attribution-NoDerivatives 4.0 International License

Text available via DOI:

View graph of relations

Infinite Derivative Gravity: a finite number of predictions

Research output: ThesisDoctoral Thesis

Published
Publication date2019
Number of pages138
QualificationPhD
Awarding Institution
Supervisors/Advisors
Publisher
  • Lancaster University
Original languageEnglish

Abstract

Ghost-free Infinite Derivative Gravity (IDG) is a modifed gravity theory
which can avoid the singularities predicted by General Relativity.
This thesis examines the effect of IDG on four areas of importance
for theoretical cosmologists and experimentalists. First, the gravitational
potential produced by a point source is derived and compared
to experimental evidence, around both Minkowski and (Anti)
de Sitter backgrounds. Second, the conditions necessary for avoidance
of singularities for perturbations around Minkowski and (Anti)
de Sitter spacetimes are found, as well as for background Friedmann-
Robertson-Walker spacetimes. Third, the modification to perturbations
during primordial inflation is derived and shown to give a constraint
on the mass scale of IDG, and to allow further tests of the
theory. Finally, the effect of IDG on the production and propagation
of gravitational waves is derived and it is shown that IDG gives
almost precisely the same predictions as General Relativity for the
power emitted by a binary system.