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Modelling Quintessential Inflation in Palatini Modified Gravity

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arxiv 2203.05424 v2 pith:QGJZPHKC submitted 2022-03-08 gr-qc astro-ph.COhep-phhep-th

classification gr-qcastro-ph.COhep-phhep-th
keywords gravityinflationmodifiedquintessentialfieldmodelnon-minimalobservations
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abstract

We study a model of quintessential inflation constructed in $R^2$ modified gravity with a non-minimally coupled scalar field, in the Palatini formalism. Our non-minimal inflaton field is characterised by a simple exponential potential. We find that successful quintessential inflation can be achieved with no fine-tuning on the model parameters. Predictions on the characteristics of dark energy will be tested by observations in the near future, while contrast with existing observations provides insights on the modified gravity background, such as the value of the non-minimal coupling and its running.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Post-Inflationary Constraints on Nonminimally Coupled Quintessential Inflation

    gr-qc 2026-08 conditional novelty 6.0 of 10

    Gravitational-wave constraints on the reheating temperature rule out single-exponential nonminimally coupled quintessential inflation and require a double-exponential coupling that predicts thawing dark energy with w0...

  2. Inflationary assessment of $F(\mathcal{R},\tilde{\mathcal{R}})$ Einstein-Cartan models

    gr-qc 2025-12 conditional novelty 5.0 of 10

    Adding cubic Holst-invariant terms to F(R,R̃) Einstein-Cartan inflation models systematically lowers the predicted spectral index n_s and tensor-to-scalar ratio r, restoring data compatibility in parameter regions whe...

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