Preheating in Higgs-like Palatini Inflation

Abstract: I discuss preheating in a plateau model similar to Higgs inflation, but with the Palatini formulation of general relativity. Due to the shape of the inflaton potential, the oscillation amplitude of the inflaton field stays almost constant for many oscillations, so that the field returns repeatedly to the plateau. This has drastic implications on reheating dynamics: the leading channel of particle production is a tachyonic instability of the inflaton field itself. This leads to an almost instantaneous reheating.

Video of Talk: https://www.youtube.com/watch?v=xWskD0Pmcqo

Talk based on [1902.10148] Preheating in Palatini Higgs inflation, by Javier Rubio, Eemeli S. Tomberg

cosmology and nongalactic astrophysicsgeneral relativity and quantum cosmology

Audience: advanced learners

( paper | slides | video )

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CosmoConβ - Cosmology from Home

Series comments: Cosmology from Home is an online cosmology conference. One of its features are pre-recorded talks, publicly available at its YouTube channel.

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