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arXiv · 2503.21610

Quintessential Inflation in Palatini $F(R,X)$ gravity

Konstantinos Dimopoulos·Christian Dioguardi·Gert Hütsi·Antonio Racioppi
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Abstract

Palatini $F(R,X)$ gravity, with $X$ the inflaton kinetic term, proved to be a powerful framework for generating asymptotically flat inflaton potentials. Here we show that a quadratic Palatini $F(R,X)$ restores compatibility with the observational data of the Peebles-Vilenkin quintessential inflation model. Moreover, the same can be achieved with an exponential version of the Peebles-Vilenkin potential if embedded in a Palatini $F(R,X)$ of order higher than two.

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Konstantinos Dimopoulos, Christian Dioguardi, Gert Hütsi, Antonio Racioppi. 2025-03-27. Quintessential Inflation in Palatini $F(R,X)$ gravity. https://doi.org/10.1140/epjp%2Fs13360-025-07025-1

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