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Warm $\beta$-exponential inflation and the Swampland Conjectures

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arxiv 2209.06153 v2 pith:OWOC5GMD submitted 2022-09-13 astro-ph.CO

classification astro-ph.CO
keywords inflationbetaconjecturesdissipationexponentialinvestigatewarmaspects
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abstract

We investigate theoretical and observational aspects of a warm inflation scenario driven by the $\beta$-exponential potential, which generalizes the well-known power law inflation. In such a scenario, the decay of the inflaton field into radiation happens during the inflationary phase. In our study, we consider a dissipation coefficient ($\Gamma$) with cubic dependence on the temperature ($T$) and investigate the consequences in the inflationary dynamics, focusing on the impact on the spectral index $n_s$, its running $n_{run}$ and tensor-to-scalar ratio $r$. We find it possible to realize inflation in agreement with current cosmic microwave background data in weak and strong dissipation regimes. We also investigate theoretical aspects of the model in light of the swampland conjectures, as warm inflation in the strong dissipation regime has been known as a way to satisfy the three conditions currently discussed in the literature. We find that when $\Gamma\propto T^3$, the $\beta$-exponential model can be accommodated into the conjectures.

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Cited by 3 Pith papers

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

  1. Stage IV CMB forecasts for warm inflation

    astro-ph.CO 2024-12 conditional novelty 5.0 of 10

    Future CMB surveys are forecast to tighten the dissipation parameter of quartic warm inflation by up to an order of magnitude and to exclude the cubic dissipation model under a null tensor-to-scalar ratio.

  2. 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.

  3. Dark Matter Freeze-In during Warm Inflation and the Seesaw Mechanism

    hep-ph 2024-12 conditional novelty 4.0 of 10

    A U(1)_{B-L} inverse-seesaw model realizes warm-inflation freeze-in of fermionic dark matter via a heavy Z' portal, with parameters adjusted to match the observed dark matter abundance and neutrino masses.

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