Strongly mixed cosmological collider at unequal sound speeds

arXiv:2610.02138 · astro-ph.CO, hep-ph, hep-th · Submitted 2026-10-01 · Read on arXiv

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

Submitted: 2026-10-01

Updated: 2026-10-01

Terminology

• Bispectrum — 28× in this paper · explained in 3 episodes
• Non-Gaussianity — 5× in this paper · explained in 2 episodes
• Alignment — 3× in this paper · explained in 1 episode
• Decoupling — 3× in this paper · explained in 2 episodes
• Primordial non-Gaussianity — 3× in this paper · explained in 2 episodes
• Degeneracy — 2× in this paper · explained in 3 episodes
• Initial Data — 2× in this paper · explained in 2 episodes
• Consistency — 1× in this paper · explained in 3 episodes
• Quantization — 1× in this paper · explained in 12 episodes

Sources

• Metric perturbations in two-field inflation
• Adiabatic and entropy perturbations from inflation
• Oscillations During Inflation and the Cosmological Density Perturbations
• Scalar perturbations during multiple-field slow-roll inflation
• Cosmological perturbations from multi-field inflation in generalized Einstein theories
• An Observational Test of Two-field Inflation
• Correlation-consistency cartography of the double inflation landscape
• Adiabatic and Isocurvature Perturbations for Multifield Generalized Einstein Models
• Curvature and isocurvature perturbations from two-field inflation in a slow-roll expansion
• Curvature and isocurvature perturbations in two-field inflation
• Perturbations in generalized multi-field inflation
• On Cross-correlations between Curvature and Isocurvature Perturbations during Inflation
• Testing Two-Field Inflation
• Strongly Coupled Perturbations in Two-Field Inflationary Models
• Features of heavy physics in the CMB power spectrum
• Cumulative effects in inflation with ultra-light entropy modes
• Constraints on holographic multi-field inflation and models based on the Hamilton-Jacobi formalism
• Seeding primordial black holes in multifield inflation
• Cosmological gravitational particle production in multifield inflation

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