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Reheating after S-Brane Ekpyrosis | | Robert Brandenberger
; Keshav Dasgupta
; Ziwei Wang
; | | Date: |
2 Jul 2020 | | Abstract: | In recent work, two of us proposed a nonsingular Ekpyrotic cosmology making
use of an S-brane which forms at the end of the phase of Ekpyrotic contraction.
This S-Brane mediates a transition between contraction and expansion.
Graviitational waves passing through the S-Brane acquire a roughly
scale-invariant spectrum, and if the S-Brane has zero shear, then a roughly
scale-invariant spectrum of cosmological perturbatiions results. Here, we study
the production of gauge field fluctuations driven by the decay of the S-Brane,
and we show that the reheating process via gauge field production will be
efficient, leading to a radiation-dominated expanding phase. | | Source: | arXiv, 2007.1203 | | Services: | Forum | Review | PDF | Favorites | |
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