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Affine inflation

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 06 Jun 2017Embargo end date: 01 Jan 2017 Turkey English Publisher:American Physical Society (APS)Journal:Physical Review D, volume 95 (issn: 2470-0010, eissn: 2470-0029,

Authors: Azri, Hemza; Demir, Durmus;

doi: 10.1103/physrevd.95.124007 , 10.48550/arxiv.1705.05822

arXiv: http://arxiv.org/abs/1705.05822

Affine inflation

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Abstract

Affine gravity, a gravity theory based on affine connection with no notion of metric, supports scalar field dynamics only if scalar fields have non-vanishing potential. The non-vanishing vacuum energy ensures that the cosmological constant is non-vanishing. It also ensures that the energy-momentum tensor of vacuum gives the dynamically generated metric tensor. We construct this affine setup and study primordial inflation in it. We study inflationary dynamics in affine gravity and general relativity, comparatively. We show that non-minimally coupled inflaton dynamics can be transformed into a minimally-coupled one with a modified potential. We also show that there is one unique frame in affine gravity, as opposed to the Einstein and Jordan frames in general relativity. Future observations with higher accuracy may be able to test the affine gravity.

10 pages, 3 figures, 3 tables. With the correct journal reference

Country

Turkey

Related Organizations

Physics department
Switzerland
Izmir Institute of Technology
Turkey

Keywords

High Energy Physics - Theory, High Energy Astrophysical Phenomena (astro-ph.HE), FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Affine gravity, General Relativity and Quantum Cosmology, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Vacuum energy, General relativity, High Energy Physics - Theory (hep-th), Astrophysics - High Energy Astrophysical Phenomena

Impact byBIP!

	citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	40
	popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.	Top 10%
	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Top 10%
	impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.	Top 10%