8 citations · 24 across the 9 of their papers we have counts for
11 papers
Audible curvaton: modulated phase transition as the origin of large-scale curvature perturbations and gravitational wave anisotropies
Wen-Yuan Ai, Gabriele Franciolini, Xin Wang +1
We propose a post-inflationary first-order phase transition modulated by a light spectator field as the origin of primordial large-scale curvature perturbations. Spectator fluctuat…
Optimized discrete Wigner representations and non-stabilizerness in qubit systems
A. B. Klimov, C. Muñoz, I. Sainz
The apparent absence of a stabilizer-specific phase-space description for qubit systems is not fundamental, but arises from fixing a state-independent discrete Wigner map. Allowing…
Numerical simulations of primordial black hole formation via delayed first-order phase transitions
Zhuan Ning, Xiang-Xi Zeng, Rong-Gen Cai +1
We perform fully nonlinear, spherically symmetric numerical simulations of superhorizon false-vacuum-domain (FVD) collapse in a coupled gravity-scalar-fluid system to study primord…
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…
Constraining interacting dark energy models with black hole superradiance
Zhen-Hong Lyu, Rong-Gen Cai, Shao-Jiang Wang +1
The recent preference for a dynamical dark energy (DE) from the Dark Energy Spectroscopic Instrument seems to call for interactions between DE and dark matter (DM), either from dir…
Scalar-induced gravitational waves including isocurvature perturbations with lattice simulations
Xiang-Xi Zeng
Scalar-induced gravitational waves (SIGWs) open a unique window into early-universe physics. While their generation from adiabatic perturbations has been extensively studied, the c…
Scalar-induced gravitational waves with non-Gaussianity up to all orders
Xiang-Xi Zeng, Zhuan Ning, Rong-Gen Cai +1
Scalar-induced gravitational waves (SIGWs) are ubiquitous in many early-Universe processes accompanied by non-Gaussianity; while Gaussian perturbation can generate significant SIGW…
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…
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…
Multiple peaks in gravitational waves induced from primordial curvature perturbations with non-Gaussianity
Xiang-Xi Zeng, Rong-Gen Cai, Shao-Jiang Wang
First-order primordial curvature perturbations are known to induce gravitational waves at the second-order, which can in turn probe the small-scale curvature perturbations near the…