Mild Non-Gaussianities under Perturbative Control from Rapid-Turn Inflation Models

29 Aug 2019 Bjorkmo Theodor Ferreira Ricardo Z. Marsh M. C. David

Inflation can be supported in very steep potentials if it is generated by rapidly turning fields, which can be natural in negatively curved field spaces. The curvature perturbation, $\zeta$, of these models undergoes an exponential, transient amplification around the time of horizon crossing, but can still be compatible with observations at the level of the power spectrum... (read more)

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  • HIGH ENERGY PHYSICS - THEORY
  • COSMOLOGY AND NONGALACTIC ASTROPHYSICS