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Non-minimally assisted chaotic inflation

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arxiv 2203.09201 v2 pith:FIMEHHNJ submitted 2022-03-17 astro-ph.CO gr-qc

classification astro-ph.COgr-qc
keywords inflationchaoticmodelassistedfieldnon-minimallypower-lawassistant
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abstract

Conventional wisdom says that a chaotic inflation model with a power-law potential is ruled out by the recent Planck-BICEP/Keck results. We find, however, that the model can be assisted by a non-minimally coupled scalar field and still provides a successful inflation. Considering a power-law chaotic inflation model of the type $V\sim \varphi^n$ with $n=\{2, 4/3, 1, 2/3, 1/3\}$, we show that $n=1/3$ ($n=\{2/3, 1/3\}$) may be revived with the help of the quadratic (quartic) non-minimal coupling of the assistant field to gravity.

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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. Genesis--Starobinsky inflation can explain the ACT data

    gr-qc 2025-09 conditional novelty 6.0 of 10

    A Genesis-to-Starobinsky inflation model in Horndeski gravity shifts the scalar spectral index upward enough to bring Starobinsky inflation into agreement with ACT CMB data.

  2. Enhancement of primordial curvature perturbations in $R^3$-corrected Starobinsky-Higgs inflation

    astro-ph.CO 2025-04 conditional novelty 6.0 of 10

    Adding a negative R^3 term to Starobinsky-Higgs inflation raises the CMB spectral index from about 0.94 to 0.965, making the model consistent with Planck while preserving the small-scale curvature enhancement needed f...

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