ACT-compatible Inflation in Scalar Field Coupled f (Q, R) Gravity

arXiv:2609.23511 · gr-qc, astro-ph.CO, hep-th · Submitted 2026-09-20 · Read on arXiv

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

Submitted: 2026-09-20

Updated: 2026-09-20

Comments: LaTeX, 47 pages

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

Terminology

• Reheating — 26× in this paper · explained in 2 episodes
• Atacama Cosmology Telescope — 4× in this paper
• ACT Data — 2× in this paper · explained in 1 episode
• Dark Energy Spectroscopic Instrument — 1× in this paper
• Non-Gaussianity — 1× in this paper · explained in 2 episodes

Sources

• The Atacama Cosmology Telescope: DR6 Power Spectra, Likelihoods and $\Lambda$CDM Parameters
• The Atacama Cosmology Telescope: DR6 Constraints on Extended Cosmological Models
• The Atacama Cosmology Telescope: DR6 Maps
• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Revisiting the Lyth bound constraints on inflation from ACT DR6 results
• Nonminimal couplings and preheating effects in $R^2$-Higgs inflation after ACT and SPT
• ACT Data and Positive Running of the Spectral Index for Scalar Theory and Modified Gravity
• Constraints on non-canonical chaotic inflation from ACT DR6 and BICEP/Keck data
• Numerical Study of Some Generalizations of the Starobinsky Inflationary Model
• Robustness of Starobinsky inflation in a minimal two-field scalar-tensor completion
• Constraining Quintessential Inflation with ACT: A Gauss-Bonnet Gateway
• Radiatively Corrected Hybrid Inflation: Parameter Scans and Machine Learning with ACT and Future CMB Experiments
• On gravitational baryogenesis in inflationary f(R) Cosmologies
• Constraining $\beta$-Exponential Inflation with the latest ACT observations
• Warm Hybrid Axion Inflation in $\alpha$-Attractor Models Constrained by ACT and Future Plan experiments
• DeepInflation: an AI agent for research and model discovery of inflation
• Ghost-free non-local $F(R)$ Gravity Compatible with ACT
• Phase space analysis of $f(R)$ cosmologies: revisiting attractor-to-GR
• Echoes of $R^3$ modification and Goldstone preheating in the CMB-BAO landscape
• Phantom Menace in general Palatini $f(R,\phi)$ theories

Related papers

• Tests of General Relativity with Einstein Telescope
• Unitary quantum matter-bounce in a universe with a positive cosmological constant
• Quasi-pole quintessential inflation in metric-affine gravity
• Dynamical tidal response of neutron stars: From effective field theory to gravitational waveforms
• Limits of the Rastall--Einstein Equivalence: Matter-Action Compatibility, FLRW Dynamics, and Exceptional Sectors
• Boson star-black hole binaries: initial data and head-on collisions