25 citations · 56 across the 14 of their papers we have counts for
14 papers
Long-term 3+1 simulations of primordial black hole formation during radiation domination
Zhuan Ning, Rong-Gen Cai, Shao-Jiang Wang +1
We develop an efficient three-dimensional numerical-relativity framework for primordial black-hole (PBH) formation from superhorizon curvature perturbations in a radiation-dominate…
Learning Boson Star Solution Families with Physics-Informed Neural Networks
Ao Liu, Chen-Hao Hao, Cuihong Wen +2
Computing boson star families traditionally requires repeated solution of nonlinear eigenvalue boundary-value problems and careful numerical continuation through turning points. We…
Primordial black hole formation in bulk-viscous cosmology
Zi-Yan Yuwen, Cristian Joana, Shao-Jiang Wang +1
We investigate primordial black hole (PBH) formation in a cosmological background with bulk viscosity. Using numerical simulations, we determine the collapse threshold and the resu…
Cosmological intercept tension
Jia-Qi Wang, Shao-Jiang Wang
The long-standing tension in the Hubble constant has motivated extensive explorations of both new physics and observational systematics, for example, the late-time systematic…
Nonperturbative stochastic inflation in perturbative dynamical background
Xiao-Quan Ye, Shao-Jiang Wang
Inflationary models that contain a transient ultra-slow-roll phase can exhibit strong non-perturbative dynamics, making the usual perturbative treatment of cosmological fluctuation…
Acoustic gravitational waves from primordial curvature perturbations
Zhuan Ning, Zi-Yan Yuwen, Xiang-Xi Zeng +2
Standard perturbative calculations of scalar-induced gravitational waves (SIGWs) have neglected nonperturbative effects in the large-amplitude regime. We develop a hybrid numerical…
Sound waves from primordial black hole formations
Zhuan Ning, Xiang-Xi Zeng, Zi-Yan Yuwen +3
We present a numerical investigation of primordial black hole (PBH) formation from super-horizon curvature perturbations and the subsequent generation and propagation of sound wave…
Relic gravitational waves from primordial gravitational collapses
Xiang-Xi Zeng, Zhuan Ning, Zi-Yan Yuwen +3
A large primordial density perturbation of the Hubble scale will gravitationally collapse, generating an outgoing sound shell, whether or not a primordial black hole (PBH) is forme…
Gravitational waves from vacuum bubbles: Ultraviolet dependence on wall thickness
Jun-Chen Wang, Shao-Jiang Wang, Zi-Yan Yuwen
The gravitational wave (GW) spectrum from the first-order phase transition can be characterized by a few phenomenological parameters but with high degeneracies in model/data distin…
Anisotropies of cosmological gravitational wave backgrounds in non-flat spacetime
Rong-Gen Cai, Shao-Jiang Wang, Zi-Yan Yuwen +1
Recent reports of stochastic gravitational wave background from four independent pulsar-timing-array collaborations have renewed the interest in the cosmological gravitational wave…
Bubble wall velocity from number density current in (non)equilibrium
Zi-Yan Yuwen, Jun-Chen Wang, Shao-Jiang Wang
Cosmological first-order phase transitions (FOPTs) serve as comprehensive probes into our early Universe with associated generations of stochastic gravitational waves and superhori…
Primordial black holes and curvature perturbations from false vacuum islands
Rong-Gen Cai, Yu-Shi Hao, Shao-Jiang Wang
Recently, much attention has been focused on the false vacuum islands that are flooded by an expanding ocean of true-vacuum bubbles slightly later than most of the other parts of t…
General bubble expansion at strong coupling
Jun-Chen Wang, Zi-Yan Yuwen, Yu-Shi Hao +1
The strongly coupled system like the quark-hadron transition (if it is of first order) is becoming an active play yard for the physics of cosmological first-order phase transitions…
General backreaction force of cosmological bubble expansion
Jun-Chen Wang, Zi-Yan Yuwen, Yu-Shi Hao +1
The gravitational-wave energy-density spectra from cosmological first-order phase transitions crucially depend on the terminal wall velocity of asymptotic bubble expansion when the…