1-5 July 2019
The University of Manchester
Europe/London timezone
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Inflation with strongly non-geodesic motion, non-Gaussianities and swampland conjectures

Presented by Dr. Jacopo FUMAGALLI on 1 Jul 2019 from 14:50 to 15:10
Type: oral presentation
Track: Cosmological Probes


Several recent proposals to embed inflation into high-energy physics rely on inflationary dynamics characterized by a strongly non-geodesic motion. This in turn relaxes the conditions of slow-roll to allow for potentials that are steep in Planck units, a welcome feature in view of the eta problem and the recently much discussed swampland conjectures. In this talk I will present a general framework to study non-Gaussianities in these type of models. This consists in deriving a non-standard single-field effective field theory with imaginary speed of sound supported by first-principle numerical computations. I will then highlight how non-geodesic trajectories in fields space naturally leads to “hyper non-Gaussianities” and a possible loss of perturbative control. This allow us to derive model-independent constraints which sharpen the range of allowed theoretical constructions.


Location: Schuster
Room: Rutherford Lecture Theatre

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