164 citations · 1.1k across the 30 of their papers we have counts for
4 papers · 1 filter
Constraints on ultra-slow-roll inflation with the NANOGrav 15-Year Dataset
Bo Mu, Jing Liu, Gong Cheng +1
Ultra-slow-roll~(USR) inflation predicts an exponential amplification of scalar perturbations at small scales, which leads to a stochastic gravitational wave background~(SGWB) thro…
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…
Distinguishing the nanohertz gravitational-wave sources by the observations of compact dark matter subhalos
Jing Liu
The latest pulsar timing array data reveals evidence of nanohertz gravitational waves (GWs), which have been explained by both cosmological and astrophysical sources. However, curr…
Enhanced curvature perturbations from spherical domain walls nucleated during inflation
Zhen-Min Zeng, Jing Liu, Zong-Kuan Guo
We investigate spherical domain walls~(DWs) nucleated via quantum tunneling in multifield inflationary models and curvature perturbations induced by the inhomogeneous distribution…