 Natural inflation

ID: natural-inflation

Codex  0 Created 2026-09-24 Updated 2026-09-24

V (ϕ) = V_{0} [1 + cos (ϕ / f)] .

Its potential slow-roll parameter obeys

ϵ_{V} = \frac{M _{Pl}}{2 f} tan \frac{ϕ}{2 f}

on the branch where the tangent is positive.

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