Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/7607
Title: Are there really conformal frames? Uniqueness of affine inflation
Authors: Azri, Hemza
Keywords: Affine gravity
Conformal frames
Einstein-Jordan frames
Induced gravity
Nonminimal coupling
Issue Date: Jul-2018
Publisher: World Scientific Publishing Co. Pte Ltd
Source: Azri, H. (2018). Are there really conformal frames? Uniqueness of affine inflation. International Journal of Modern Physics D, 27(9). doi:10.1142/S0218271818300069
Abstract: Here, we concisely review the nonminimal coupling dynamics of a single scalar field in the context of purely affine gravity and extend the study to multifield dynamics. The coupling is performed via an affine connection and its associated curvature without referring to any metric tensor. The latter arises a posteriori and it may gain an emergent character like the scale of gravity. What is remarkable in affine gravity is the transition from nonminimal to minimal couplings which is realized by only field redefinition of the scalar fields. Consequently, the inflationary models gain a unique description in this context where the observed parameters, like the scalar tilt and the tensor-to-scalar ratio, are invariant under field reparametrization. Overall, gravity in its affine approach is expected to reveal interesting and rich phenomenology in cosmology and astroparticle physics.
URI: https://doi.org/10.1142/S0218271818300069
https://hdl.handle.net/11147/7607
ISSN: 0218-2718
0218-2718
1793-6594
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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