5 citations · 5 across the 2 of their papers we have counts for
6 papers
Probing Bose-enhanced Inflaton Decay with Gravitational Waves
Nicolás Bernal, Quan-feng Wu, Xun-Jie Xu +1
We investigate cosmic reheating dynamics in the presence of a transient condensate formed by bosonic decay products of the inflaton. We show that the emergence of such a condensate…
Primordial Black Holes Evaporating before Big Bang Nucleosynthesis
Quan-feng Wu, Xun-Jie Xu
Primordial black holes (PBHs) formed from the collapse of density fluctuations provide a unique window into the physics of the early Universe. Their evaporation through Hawking rad…
A Unified Bogoliubov Approach to Primordial Gravitational Waves: From Inflation to Reheating
Yubing Wang, Quan-feng Wu, Xun-Jie Xu
We present an effective numerical method that can be used to straightforwardly calculate the full spectrum of primordial gravitational waves produced during inflation and reheating…
No Hiding in the Dark: Cosmological Bounds on Heavy Neutral Leptons with Dark Decay Channels
P. S. Bhupal Dev, Quan-feng Wu, Xun-Jie Xu
Heavy neutral leptons (HNLs) are well-motivated new physics candidates. The mixing of sub-GeV HNLs with active neutrinos is severely constrained by cosmology. In particular, the su…
Pre-thermalized Gravitational Waves
Nicolás Bernal, Quan-feng Wu, Xun-Jie Xu +1
We investigate a novel gravitational wave (GW) production mechanism from gravitons generated during the pre-thermal phase of cosmic reheating, where the energy density is dominated…
High-Energy and Ultra-High-Energy Neutrinos from Primordial Black Holes
Quan-feng Wu, Xun-Jie Xu
Primordial Black Holes (PBHs) are capable of emitting extremely energetic particles independent of their interactions with the Standard Model. In this work, we investigate whether…