Quasi-pole inflation in metric-affine gravity
Abstract
We propose a new mechanism for inflationary model building in the framework of metric-affine gravity. Such a mechanism involves an inflaton non-minimally coupled with the Holst invariant. If the non-minimal coupling function has a zero point and it is very steep at that same point, the corresponding inflaton kinetic function will feature a quasi-pole behaviour, implying a canonically normalized potential featuring an exponential plateau, regardless of the shape of the original inflaton potential. The inflationary predictions in such a region are equivalent to the ones of Starobinsky inflation.
Keywords
Cite
@article{arxiv.2512.16815,
title = {Quasi-pole inflation in metric-affine gravity},
author = {Antonio Racioppi},
journal= {arXiv preprint arXiv:2512.16815},
year = {2026}
}
Comments
17 pages, title changed, analysis expanded, extends the results of arXiv:2411.08031 to a larger class of models, version accepted for publication on GRG