# Non-linear scalar field dynamics in particle physics motivated models of the early universe

Cefalá, Francesco. Non-linear scalar field dynamics in particle physics motivated models of the early universe. 2018, Doctoral Thesis, University of Basel, Faculty of Science.

 Preview

19Mb

Official URL: http://edoc.unibas.ch/diss/DissB_12904

In the second part we consider different realisations of a supersymmetric model of hilltop inflation in which an additional scalar field $\chi$ couples to the inflaton. We find that during preheating $\chi$ can get resonantly amplified due to a non-standard parametric resonance that is driven by the dynamics of inhomogeneous inflaton fluctuations. Moreover, we show that qualitative differences in the dynamics of the fields are manifested in the resulting GW background.