Journal
PHYSICAL REVIEW D
Volume 102, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.102.063514
Keywords
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Funding
- NSERC
- Canada Research Chair program
- McGill Space Institute Graduate Fellowship
- Templeton Foundation
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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. Gravitational 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.
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