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Research output: Thesis › Doctoral Thesis
Research output: Thesis › Doctoral Thesis
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TY - BOOK
T1 - Infinite Derivative Gravity
T2 - a finite number of predictions
AU - Edholm, James
PY - 2019
Y1 - 2019
N2 - Ghost-free Infinite Derivative Gravity (IDG) is a modifed gravity theorywhich can avoid the singularities predicted by General Relativity.This thesis examines the effect of IDG on four areas of importancefor theoretical cosmologists and experimentalists. First, the gravitationalpotential produced by a point source is derived and comparedto experimental evidence, around both Minkowski and (Anti)de Sitter backgrounds. Second, the conditions necessary for avoidanceof 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 perturbationsduring primordial inflation is derived and shown to give a constrainton the mass scale of IDG, and to allow further tests of thetheory. Finally, the effect of IDG on the production and propagationof gravitational waves is derived and it is shown that IDG givesalmost precisely the same predictions as General Relativity for thepower emitted by a binary system.
AB - Ghost-free Infinite Derivative Gravity (IDG) is a modifed gravity theorywhich can avoid the singularities predicted by General Relativity.This thesis examines the effect of IDG on four areas of importancefor theoretical cosmologists and experimentalists. First, the gravitationalpotential produced by a point source is derived and comparedto experimental evidence, around both Minkowski and (Anti)de Sitter backgrounds. Second, the conditions necessary for avoidanceof 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 perturbationsduring primordial inflation is derived and shown to give a constrainton the mass scale of IDG, and to allow further tests of thetheory. Finally, the effect of IDG on the production and propagationof gravitational waves is derived and it is shown that IDG givesalmost precisely the same predictions as General Relativity for thepower emitted by a binary system.
U2 - 10.17635/lancaster/thesis/518
DO - 10.17635/lancaster/thesis/518
M3 - Doctoral Thesis
PB - Lancaster University
ER -