99 citations · 305 across the 6 of their papers we have counts for
4 papers · 1 filter
Production of gravitational waves during preheating in the Starobinsky inflationary model
Guoqiang Jin, Chengjie Fu, Puxun Wu +1
The production of GWs during preheating in the Starobinsky model with a nonminimally coupled auxiliary scalar field is studied through the lattice simulation in this paper. We find…
Resonance instability of primordial gravitational waves during inflation in Chern-Simons gravity
Chengjie Fu, Jing Liu, Tao Zhu +2
We investigate axion inflation where the gravitational Chern-Simons term is coupled to a periodic function of the inflaton. We find that tensor perturbations with different polariz…
Primordial black holes and oscillating gravitational waves in slow-roll and slow-climb inflation with an intermediate non-inflationary phase
Chengjie Fu, Puxun Wu, Hongwei Yu
We propose a new single field inflation model in which the usual slow-roll inflation is joined to a new period of slow-climb and slow-roll inflation through a short intermediate no…
Scalar induced gravitational waves in inflation with gravitationally enhanced friction
Chengjie Fu, Puxun Wu, Hongwei Yu
We study the scalar induced gravitational wave (GW) background in inflation with gravitationally enhanced friction (GEF). The GEF mechanism, which is realized by assuming a nonmini…