6 papers
Stability of Anomalous Dissipation for the Forced 3D Navier--Stokes Equations under Geometric Perturbations
Changhong Li
The energy dissipation in the inviscid limit is a central problem in turbulence theory. Kolmogorov's K41 theory predicts a positive dissipation rate independent of viscosity -- a p…
Probing the Bounce Energy Scale in Bouncing Cosmologies with Pulsar Timing Arrays
Junrong Lai, Changhong Li
In this work we constrain the bounce energy scale in a generic framework of bouncing cosmologies using the nanohertz stochastic gravitational-wave backgroun…
Accelerated Bayesian Inference for Pulsar Timing Arrays: Normalizing Flows for Rapid Model Comparison Across Stochastic Gravitational-Wave Background Sources
Junrong Lai, Changhong Li
The recent detection of nanohertz stochastic gravitational-wave backgrounds (SGWBs) by pulsar timing arrays (PTAs) promises unique insights into astrophysical and cosmological orig…
Gravitational Wave Constraints on the Bouncing Energy Scale of Big Bounce Cosmology
Changhong Li
Big bounce cosmology provides a solution to the Universe's initial singularity, and stochastic gravitational wave background (SGWB) searches offer a promising avenue for testing th…
Primordial Gravitational Waves of Big Bounce Cosmology in Light of Stochastic Gravitational Wave Background
Changhong Li
Primordial gravitational waves from the very early stages of the universe, such as inflation or bounce processes, are an irreducible cosmological source of the stochastic gravitati…
Dual Inflation and Bounce Cosmologies Interpretation of Pulsar Timing Array Data
Changhong Li, Junrong Lai, Jinjie Xiang +1
We explore a dual scenario of generalized inflation and bounce cosmologies, producing a scale-invariant curvature perturbation spectrum. Bayesian analysis with pulsar timing array…