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An EFT Map of Axion Dark Radiation from Reheating
Yong Xu
Light, weakly coupled sectors can retain information about the cosmological background in which they are produced. We study light axions produced during reheating and their contrib…
Graviton Production from Inflaton Condensate: Boltzmann vs Bogoliubov
Chenhuan Wang, Yong Xu, Wenbin Zhao
We study graviton production from an oscillating inflaton condensate during reheating by systematically comparing Boltzmann and Bogoliubov descriptions for inflaton potentials of t…
Full-Spectrum Analysis of Gravitational Wave Production from Inflation to Reheating
Xun-Jie Xu, Yong Xu, Qiqin Yin +1
In this work, we systematically study gravitational wave (GW) production during both the inflationary and post-inflationary epochs. While inflationary GWs can be readily derived fr…
Graviton- and Inflaton-mediated Dark Matter Production after Large Field Polynomial Inflation
Nicolás Bernal, Julia Harz, Martin A. Mojahed +1
Polynomial inflation is a simple cosmological scenario, which fits the cosmic microwave background data well. It provides testable predictions for the tensor-to-scalar ratio and th…
Parameter Space of Leptogenesis in Polynomial Inflation
Manuel Drees, Yong Xu
Polynomial inflation is a very simple and well motivated scenario. A potential with a concave ``almost'' saddle point at field value fits well the cosmic microwave backgro…