144 citations · 587 across the 16 of their papers we have counts for
16 papers
Explaining Pulsar Timing Array Observations with Primordial Gravitational Waves in Parity-Violating Gravity
Chengjie Fu, Jing Liu, Xing-Yu Yang +2
The pulsar timing array (PTA) collaborations have recently suggested the presence of a gravitational wave background at nano-Hertz frequencies. In this paper, we explore potential…
Particle production during Inflation with a non-minimally coupled spectator scalar field
Zhe Yu, Chengjie Fu, Zong-Kuan Guo
We study the inflationary model with a spectator scalar field coupled to both the inflaton and Ricci scalar. The interaction between the field and the gravity, denoted by $…
Sudden braking and turning with a two-field potential bump: primordial black hole formation
Chengjie Fu, Chao Chen
We investigate the amplification of curvature perturbations in a two-field inflation model featuring a Gaussian potential bump. When the inflaton encounters a potential bump along…
Primordial black holes and induced gravitational waves from double-pole inflation
Chengjie Fu, Shao-Jiang Wang
The primordial black hole (PBH) productions from the inflationary potential with an inflection point usually rely heavily on the fine-tuning of the model parameters. We propose in…
Generation of gravitational waves in dynamical Chern-Simons gravity
Zhi-Zhang Peng, Zhen-Min Zeng, Chengjie Fu +1
We investigate gravitational waves (GWs) generated in a two-field inflationary model with a non-canonical kinetic term, in which the gravitational Chern-Simons term is coupled to a…
Parity violation in stochastic gravitational wave background from inflation
Rong-Gen Cai, Chengjie Fu, Wang-Wei Yu
We study the inflationary implications of a novel parity-violating gravity model, which modifies the teleparallel equivalent of general relativity by introducing the Nieh-Yan term…