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Natural inflation

Natural inflation uses a periodic potential

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.

Table of contents 33 1
- E-fold count for the natural-inflation cosine potential Natural inflation 10

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