Tunnelling out of Starobinsky inflation: Raising the spectral tilt

arXiv:2607.15354 · astro-ph.CO, gr-qc, hep-ph · Submitted 2026-07-16 · Read on arXiv

Jose A. R. Cembranos, Jesús Luque, Javier Rubio

astro-ph.CO, gr-qc, hep-ph

Submitted: 2026-07-16

Comments: 28 pages, 5 figures

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Reheating — 44× in this paper · explained in 2 episodes
• Benchmark — 17× in this paper · explained in 2 episodes
• Phase Transitions — 12× in this paper · explained in 2 episodes
• Consistency — 5× in this paper · explained in 3 episodes
• Abundance — 4× in this paper · explained in 1 episode
• Accuracy — 3× in this paper · explained in 1 episode
• Homogeneity — 2× in this paper · explained in 2 episodes
• Nonminimal coupling — 1× in this paper · explained in 2 episodes
• Symmetry Breaking — 1× in this paper · explained in 3 episodes

Sources

• TASI Lectures on Inflation
• Planck 2018 results. X. Constraints on inflation
• BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
• Improved limits on the tensor-to-scalar ratio using BICEP and Planck
• The Atacama Cosmology Telescope: DR6 Constraints on Extended Cosmological Models
• The Atacama Cosmology Telescope: DR6 Power Spectra, Likelihoods and $\Lambda$CDM Parameters
• DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
• DESI 2024 III: Baryon Acoustic Oscillations from Galaxies and Quasars
• Refined Predictions for Starobinsky Inflation and Post-inflationary Constraints in Light of ACT
• Reheating ACTs on Starobinsky and Higgs inflation
• Curvature corrections to Starobinsky inflation can explain the ACT results
• Inflation in $F(R)$ gravity models revisited after ACT
• Testing scale-invariant inflation against cosmological data
• False vacuum decay: an introductory review
• Detecting gravitational waves from cosmological phase transitions with LISA: an update
• Gravitational waves from first-order phase transitions in LISA: reconstruction pipeline and physics interpretation
• Viable inflationary models ending with a first-order phase transition
• Exit from Inflation with a First-Order Phase Transition and a Gravitational Wave Blast
• Open inflation in the landscape
• Echoes of Inflationary First-Order Phase Transitions in the CMB

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