Second potential slow-roll parameter
= Second potential slow-roll parameter
{title2=$\eta_V$}
The second potential slow-roll parameter is
$$
\eta_V=M_{\rm Pl}^2\frac{V''}{V}.
$$
Slow roll usually requires both $\epsilon_V\ll1$ and $|\eta_V|\ll1$.
= Second potential slow-roll parameter
{title2=$\eta_V$}
The second potential slow-roll parameter is
$$
\eta_V=M_{\rm Pl}^2\frac{V''}{V}.
$$
Slow roll usually requires both $\epsilon_V\ll1$ and $|\eta_V|\ll1$.