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Cosmic inflation

Slow-roll approximation

{title2=$\epsilon$}

The first Hubble slow-roll parameter is
$$
\epsilon=-\frac{\dot H}{H^2}.
$$
For a canonical inflaton, $\epsilon=\dot\phi^2/(2M_{\rm Pl}^2H^2)\geq0$.


First Hubble slow-roll parameter

Second Hubble slow-roll parameter

Past exam of the mathematics course of the University of Cambridge / 2024 / iii / Paper 310 / 4 / d / Solution

Past exam of the mathematics course of the University of Cambridge / 2024 / iii / Paper 312 / 2 / ii / Solution

First Hubble slow-roll parameter ( $ϵ$ )

Second Hubble slow-roll parameter ( $η$ )

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First Hubble slow-roll parameter (ϵ)

Second Hubble slow-roll parameter (η)

 Ancestors (6)

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 Articles by others on the same topic (0)

First Hubble slow-roll parameter ( $ϵ$ )

Second Hubble slow-roll parameter ( $η$ )

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