7 papers
Gravitational superfluorescence from superradiant axion clouds
Zhen-Hong Lyu, Rong-Gen Cai, Jing Liu
Boson clouds formed via superradiance around spinning black holes offer a novel probe of ultralight particles. We show that such gravitational atoms can undergo a self-stimulated a…
Gravitational wave cosmology
Ligong Bian, Rong-Gen Cai, Yu-Qi Dong +18
Gravitational waves (GWs) originating from cosmological sources offer direct insights into the physics of the primordial Universe, the fundamental nature of gravity, and the cosmic…
The curvature perturbations and induced gravitational waves induced by the first-order phase transition during reheating
Xiao-Bin Sui, Jing Liu, Rong-Gen Cai
We propose a novel mechanism where a first-order phase transition modulates the decay rate of a massive field. This modulation, even if the scalar field has negligible energy densi…
Probing Warm Inflation via Correlated Gravitational Waves from First Order Phase Transitions
Xiao-Bin Sui, Jing Liu, Rong-Gen Cai
We investigate the properties of gravitational waves generated by heating induced phase transitions in warm inflation. In this scenario, the heating phase of inflation followed by…
The power of SKA to Constrain cosmological gravitational-wave backgrounds below the astrophysical foreground noise
Chengjie Fu, Jing Liu
The inspirals of supermaissive black hole binaries provide a convinced gravitational wave background in the nHz band, serving as the fiducial model of the recent gravitational wave…
Enhancement of small-scale induced gravitational waves from the soliton/oscillon domination
Xiao-Bin Sui, Jing Liu, Rong-Gen Cai
We investigate density fluctuations and scalar-induced gravitational waves (GWs) arising from the production of long-lived solitons and oscillons, which can dominate the early Univ…