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Hillclimbing inflation in metric and Palatini formulations

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arxiv 1812.11077 v2 pith:ST7KQJKA submitted 2018-12-24 gr-qc hep-ph

Ryusuke Jinno , Kunio Kaneta , Kin-ya Oda , Seong Chan Park This is my paper · ORCID
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keywords formulationscosmicinflationinflatonmetricpalatinipotentialallowed
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A new setup of cosmic inflation with a periodic inflaton potential and conformal factor is discussed in the metric and Palatini formulations of gravity. As a concrete example, we focus on a natural-inflation-like inflaton potential, and show that the inflationary predictions fall into the allowed region of cosmic microwave background observations in both formulations.

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Cited by 1 Pith paper

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  1. Constant-roll $\beta$-exponential inflation: Palatini formalism

    gr-qc 2026-01 reject novelty 4.0 of 10

    A parameter scan of constant-roll β-exponential inflation in Palatini R² gravity claims agreement with ACT/Planck contours, but the derivation is undermined by algebraic sign errors and an absent non-Gaussianity calculation.

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