Inflation (2025)
John Ellis, Vincent Vennin, David Wands
TL;DR
This review summarizes the state of cosmological inflation research as of 2025, covering models, observational constraints, and future prospects in understanding the early universe.
Contribution
It provides a comprehensive overview of inflation theories, observational data, and future directions, consolidating recent advances for the Particle Data Book chapter.
Findings
Summary of inflation models and their viability
Constraints on reheating from current data
Potential future probes of inflation phenomena
Abstract
This is a review article for The Review of Particle Physics 2026 (aka the Particle Data Book), appearing as Chapter 23. It forms a compact review of our understanding of cosmological inflation near the end of 2025. Topics included are Scalar Field Cosmology; Primordial Perturbations from Inflation; Models; Model Comparison; Constraints on Reheating; Beyond Single-Field Inflation; Initial-conditions and Fine-tuning; Future Probes of Inflation.
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Taxonomy
TopicsSolar and Space Plasma Dynamics