Reconciling Inflation with Anisotropies at Small Scales

arXiv:2508.06796 · gr-qc, astro-ph.CO · Submitted 2025-08-09 · Read on arXiv

gr-qc, astro-ph.CO

Submitted: 2025-08-09

Updated: 2026-09-20

Comments: Simplified to ease comparison with arXiv:2608.19765, 30 pages, no figures

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

Terminology

• Anisotropy — 94× in this paper · explained in 3 episodes
• Reheating — 20× in this paper · explained in 2 episodes
• Hubble Tension — 6× in this paper · explained in 9 episodes
• Trace — 5× in this paper · explained in 2 episodes
• Decoupling — 4× in this paper · explained in 2 episodes
• Adam — 3× in this paper · explained in 2 episodes
• Hysteresis — 3× in this paper · explained in 3 episodes
• Alignment — 2× in this paper · explained in 1 episode
• Clustering — 2× in this paper · explained in 2 episodes
• Homogeneity — 2× in this paper · explained in 2 episodes
• Holonomy — 1× in this paper · explained in 2 episodes
• Weak Lensing — 1× in this paper · explained in 2 episodes

Sources

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• The evidence for a spatially flat Universe
• Eppur \`e piatto? The cosmic chronometer take on spatial curvature and cosmic concordance
• Nonparametric late-time expansion history reconstruction and implications for the Hubble tension in light of recent DESI and type Ia supernovae data
• One Extension to Explain Them All, One Scale-Invariant Spectrum to Test Them All, and in One Model Bind Them
• SPT-3G D1: CMB temperature and polarization power spectra and cosmology from 2019 and 2020 observations of the SPT-3G Main field
• The Geometry of Large Causal Diamonds and the No Hair Property of Asymptotically de-Sitter Spacetimes
• Isotropization of the universe during inflation
• What can the observation of nonzero curvature tell us?
• CMB line-of-sight integrators for nearly-isotropic cosmological models
• Inflationary Universe with Anisotropic Hair
• Anisotropic Power-law Inflation
• Anisotropic warm inflation
• Testing spatial curvature and anisotropic expansion on top of the $\Lambda$CDM model
• Is the Observable Universe Consistent with the Cosmological Principle?
• Probing the Cosmological Principle with weak lensing shear

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