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- W3100180366 abstract "We study the evolution of the non-linear curvature perturbation during perturbative reheating, and hence how observables evolve to their final values which we may compare against observations. Our study includes the evolution of the two trispectrum parameters, $gnl$ and $taunl$, as well as the scale dependence of both $fnl$ and $taunl$. In general the evolution is significant and must be taken into account, which means that models of multifield inflation cannot be compared to observations without specifying how the subsequent reheating takes place. If the trispectrum is large at the end of inflation, it normally remains large at the end of reheating. In the classes of models we study, it is very hard to generate $taunlggfnl^2$, regardless of the decay rates of the fields. Similarly, for the classes of models in which $gnlsimeqtaunl$ during slow--roll inflation, we find the relation typically remains valid during reheating. Therefore it is possible to observationally test such classes of models without specifying the parameters of reheating, even though the individual observables are sensitive to the details of reheating. It is hard to generate an observably large $gnl$ however. The runnings, $nfnl$ and $ntaunl$, tend to satisfy a consistency relation $ntaunl=(3/2)nfnl$, but are in general too small to be observed for the class of models considered regardless of reheating timescale." @default.
- W3100180366 created "2020-11-23" @default.
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- W3100180366 date "2013-08-05" @default.
- W3100180366 modified "2023-10-16" @default.
- W3100180366 title "Influence of reheating on the trispectrum and its scale dependence" @default.
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- W3100180366 doi "https://doi.org/10.1088/1475-7516/2013/08/006" @default.
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