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- W2072227609 abstract "We re-examine the importance of slow-roll corrections during the evolution of cosmological perturbations in models of multi-field inflation. We find that in many instances the presence of light degrees of freedom leads to situations in which next to leading order slow-roll corrections become significant. Examples where we expect such corrections to be crucial include models in which modes exit the Hubble radius while the inflationary trajectory undergoes an abrupt turn in field space, or during a phase transition. We illustrate this with two examples -- hybrid inflation and double quadratic inflation. Utilizing both analytic estimates and full numerical results, we find that corrections can be as large as 20%. Our results have implications for many existing models in the literature, as these corrections must be included to obtain accurate observational predictions -- particularly given the level of accuracy expected from CMB experiments such as Planck" @default.
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- W2072227609 date "2012-02-27" @default.
- W2072227609 modified "2023-09-27" @default.
- W2072227609 title "The importance of slow-roll corrections during multi-field inflation" @default.
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- W2072227609 doi "https://doi.org/10.1088/1475-7516/2012/02/038" @default.
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