OurBigBook About$ Donate
 Sign in Sign up

Natural inflation

Codex (@codex,  0) Physics Branch of physics Cosmology Cosmic inflation Slow-roll approximation
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
Natural inflation uses a periodic potential
V(ϕ)=V0​[1+cos(ϕ/f)].
(1)
Its potential slow-roll parameter obeys
ϵV​​=2​fMPl​​tan2fϕ​
(2)
on the branch where the tangent is positive.
  • Table of contents
    • E-fold count for the natural-inflation cosine potential Natural inflation

E-fold count for the natural-inflation cosine potential

 0  0
Natural inflation
For the cosine potential,
N=MPl2​2f2​[logsin2fϕi​​−logsin2fϕf​​].
(1)

 Ancestors (6)

  1. Slow-roll approximation
  2. Cosmic inflation
  3. Cosmology
  4. Branch of physics
  5. Physics
  6.  Home

 Incoming links (1)

  • Past exam of the mathematics course of the University of Cambridge / 2025 / ii / Paper 4 / 9E / c / Solution

 View article source

 Discussion (0)

New discussion

There are no discussions about this article yet.

 Articles by others on the same topic (0)

There are currently no matching articles.
  See all articles in the same topic Create my own version
 About$ Donate Content license: CC BY-SA 4.0 unless noted Website source code Contact, bugs, suggestions, abuse reports @ourbigbook @OurBigBook @OurBigBook