Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/7546
Title: Induced affine inflation
Authors: Azri, Hemza
Demir, Durmuş Ali
Keywords: Gravitation
Gravitational constant
Induced gravity
Inflationary dynamics
Issue Date: Feb-2018
Publisher: American Physical Society
Source: Azri, H., and Demir, D. A. (2018). Induced affine inflation. Physical Review D, 97(4). doi:10.1103/PhysRevD.97.044025
Abstract: Induced gravity, metrical gravity in which gravitational constant arises from vacuum expectation value of a heavy scalar, is known to suffer from Jordan frame vs Einstein frame ambiguity, especially in inflationary dynamics. Induced gravity in affine geometry, as we show here, leads to an emergent metric and gravity scale, with no Einstein-Jordan ambiguity. While gravity is induced by the vacuum expectation value of the scalar field, nonzero vacuum energy facilitates generation of the metric. Our analysis shows that induced gravity results in a relatively large tensor-to-scalar ratio in both metrical and affine gravity setups. However, the fact remains that the induced affine gravity provides an ambiguity-free framework.
URI: https://doi.org/10.1103/PhysRevD.97.044025
https://hdl.handle.net/11147/7546
ISSN: 2470-0010
2470-0010
2470-0029
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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