collaborators

5 papers

astro-ph.CO2025

Forecast Constraints on Bouncing Cosmology from High Frequency Gravitational Waves Using Superconducting LC Circuits and Resonant Cavities

Changhong Li

We exploit forecast sensitivities to high frequency gravitational waves (HFGWs) from superconducting LC circuits, traditional resonant cavity and superconducting radio frequency (S…

astro-ph.CO2025

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…

astro-ph.CO2025

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…

astro-ph.CO2024

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…

astro-ph.CO2024

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…