Optimized numerical evolution of perturbations across sharp background trajectory turns in multifield inflation

arXiv:2603.27080 · gr-qc, astro-ph.CO, hep-th · Submitted 2026-03-28 · Read on arXiv

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

Submitted: 2026-03-28

Updated: 2026-10-07

Comments: 24+1 pages, 10 figures, 3 ancillary animations, comments are welcome

Journal ref: JCAP10(2026)019

DOI: 10.1088/1475-7516/2026/10/019

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

Terminology

• Consistency — 4× in this paper · explained in 3 episodes
• Generalization — 4× in this paper · explained in 13 episodes
• Quantization — 4× in this paper · explained in 12 episodes
• Wigner function — 4× in this paper · explained in 2 episodes
• Trace — 3× in this paper · explained in 2 episodes
• Anisotropy — 2× in this paper · explained in 3 episodes
• Accuracy — 1× in this paper · explained in 1 episode
• Alignment — 1× in this paper · explained in 1 episode
• Dynamical regimes — 1× in this paper · explained in 2 episodes
• Gauge Freedom — 1× in this paper · explained in 2 episodes
• Homogeneity — 1× in this paper · explained in 2 episodes
• Non-Gaussianity — 1× in this paper · explained in 2 episodes
• Nonminimal coupling — 1× in this paper · explained in 2 episodes
• Primordial non-Gaussianity — 1× in this paper · explained in 2 episodes
• Redundancy — 1× in this paper · explained in 2 episodes
• Robustness — 1× in this paper · explained in 5 episodes

Sources

• Summary of Results from COBE
• Planck 2018 results. X. Constraints on inflation
• The Simons Observatory: Science goals and forecasts
• CMB-S4: Forecasting Constraints on Primordial Gravitational Waves
• CMB-S4: Iterative Internal Delensing and $r$ Constraints
• The Simons Observatory: Combining delensing and foreground cleaning for improved constraints on inflation
• Cosmological Attractors and Asymptotic Freedom of the Inflaton Field
• On hilltop and brane inflation after Planck
• Hybrid cosmological attractors
• Inflationary $\alpha$-Attractor From Type IIB/F Theory
• Geometrical Destabilization of Inflation
• Higgs-Dilaton Cosmology: From the Early to the Late Universe
• Random Potentials and Cosmological Attractors
• Multi-field Inflation in High-Slope Potentials
• Sharp turns in axion monodromy: primordial black holes and gravitational waves
• The Trans-Planckian Problem of Inflationary Cosmology
• Observational Constraints on Constant Roll Inflation
• Two-point correlators revisited: Fast and slow scales in multifield models of inflation
• TASI Lectures on Inflation
• The Effective Field Theory of Inflation Models with Sharp Features

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