Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session E01: Poster Session I (5:45pm-7:45pm)
Saturday, April 13, 2019
Sheraton Room: Plaza Foyer
Abstract: E01.00016 : Preheating after Multifield Inflation with Nonminimal Couplings
John T Giblin Jr.
David I Kaiser
(Department of Physics, M.I.T.)
Evangelos I Sfakianakis
(Nihkef, Leiden University)
Jorinde van de Vis
Reheating provides a mechanism to produce particles and thermalize them to "reheat" the Universe to a sufficiently high temperature after cosmic inflation. Preheating accelerates the process of reheating by employing non-linear physics for an exponential particle production. Here we explore this phenomenon after multifield inflation in which the fields are coupled nonminimally to gravity. In the Einstein frame, this phenomenon manifests itself as a non-trivial field-space metric. Using GABE, we simulate preheating in this context and verify the consistency of our fully non-linear approach by comparing to results from perturbation theory. We extend this analysis to study when non-linearity dominates the process and preheating ceases to be efficient.
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