Quintessential Inflation in Palatini F(R,X) gravity

2025/03/27 by Dimopoulos, Konstantinos, Dioguardi, Christian, Hütsi, Gert +1 · 3 citations
#Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2503.21610

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.

Cited by

• Exponential plateaus and inflation in metric-affine gravity
• Natural inflation in Palatini F(R)
• Dynamical system analysis of the cosmological phases in Palatini k-essence gravity

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