Séminaire / Seminar GReCO |
| « Manyfield inflation » |
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David Marsh |
| The inflationary paradigm provides a rather simple explanation of the cosmological origin of structure, but the micro-physics governing this epoch remains elusive. For example, it is not known whether the dynamics of the early universe involved just a single or multiple fields. Part of this problem stems from the computational complexity of extracting predictions from general multiple-field models, and most progress in the past has involved models with only very few fields, or very simple potentials. In this talk, I will discuss two new, independent methods that enables the study of inflationary models with many fields subject to general, randomly generated interaction terms. I will discuss novel features of the generation of cosmological observables using explicit examples of manyfield inflation involving up to 100 fields, and I will compare the predictions of the two methods. In particular, I will discuss the generation of non-Gaussianity in these manyfield models, and critically assess the prospects of the next generation of cosmological experiments. |
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lundi 6 novembre 2017 - 11:00 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |