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- W1497643614 abstract "We revisit the notion of slow-roll in the context of general single-field inflation. As a generalization of slow-roll dynamics, we consider an inflaton $phi$ in an attractor phase where the time derivative of $phi$ is determined by a function of $phi$, $dotphi=dotphi(phi)$. In other words, we consider the case when the number of $e$-folds $N$ counted backward in time from the end of inflation is solely a function of $phi$, $N=N(phi)$. In this case, it is found that we need a new independent parameter to properly describe the dynamics of the inflaton field in general, in addition to the standard parameters conventionally denoted by $epsilon$, $eta$, $c_s^2$ and $s$. Two illustrative examples are presented to discuss the non-slow-roll dynamics of the inflaton field consistent with observations." @default.
- W1497643614 created "2016-06-24" @default.
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- W1497643614 date "2015-02-14" @default.
- W1497643614 modified "2023-09-26" @default.
- W1497643614 title "A new parameter in attractor single-field inflation" @default.
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- W1497643614 doi "https://doi.org/10.48550/arxiv.1502.04167" @default.
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