39 citations · 109 across the 11 of their papers we have counts for
13 papers
Probing the stochastic signal from primordial gravitational waves with pulsar timing arrays
Jun Li, Guanghai Guo, Pengfei Yan
In this study, we investigate the scenario in which the stochastic signal arises from primordial gravitational waves. Within this framework, we consider two distinct possibilities:…
Constraints on the canonical single-field slow-roll inflation model from observations
Jun Li, Guanghai Guo, Guang-Hai Guo +2
In this work, we employ two complementary approaches to constrain the canonical single-field slow-roll inflation scenario. The first method makes explicit use of the analytic depen…
Probing the scalar-induced gravitational waves with the Five-hundred-meter Aperture Spherical radio Telescope and the Square Kilometer Array
Jun Li, Guanghai Guo, Pengfei Yan
Gravitational wave astronomy presents a promising opportunity to directly observe scalar-induced gravitational waves originating from the early universe. Experiments, including gro…
Probing the speed of scalar-induced gravitational waves with pulsar timing arrays
Zu-Cheng Chen, Jun Li, Lang Liu +1
Recently, several regional pulsar timing array collaborations, including CPTA, EPTA, PPTA, and NANOGrav, have individually reported compelling evidence for a stochastic signal at n…
Measuring the speed of scalar induced gravitational waves from observations
Jun Li, Guang-Hai Guo
We investigate the scalar induced gravitational waves which propagate with a speed different from the speed of light. First, we analytically calculate the expression of the power s…
Measuring the primordial curvature perturbations from the scalar induced gravitational waves
Jun Li, Guang-Hai Guo
The scalar induced gravitational waves are produced from primordial curvature perturbations in the second order of perturbations. We constrain the fractional energy density of scal…
Measuring the modified gravitational waves propagation beyond general relativity from CMB observations
Jun Li
In modified gravity theories, the gravitational waves propagation are presented in nonstandard ways. We consider a friction term different from GR and constrain the modified gravit…
Measuring the scalar induced gravitational waves from observations
Jun Li, Guang-Hai Guo
We measure the scalar induced gravitational waves from the cosmic microwave background (CMB) observations and the gravitational wave observations. In the CDM+ model, we const…
Measuring the primordial gravitational waves from cosmic microwave background and stochastic gravitational wave background observations
Jun Li, Guang-Hai Guo
We constrain the primordial gravitational waves from cosmic microwave background (CMB) and stochastic gravitational wave background (SGWB) observations. SGWB provides the latest wa…
Measuring the tilt of primordial gravitational-wave power spectrum from observations
Jun Li, Zu-Cheng Chen, Qing-Guo Huang
Primordial gravitational waves generated during inflation lead to the B-mode polarization in the cosmic microwave background and a stochastic gravitational wave background in the U…
Inflation model selection revisited
Jun Li, Qing-Guo Huang
We update the constraints on the power spectra of primordial curvature perturbation and tensor perturbation including Planck data 2015 (P15) and recently released BICEP2/Keck data…
Measuring the spectral running from cosmic microwave background and primordial black holes
Jun Li, Qing-Guo Huang
We constrain the spectral running by combining cosmic microwave background (CMB) data, baryon acoustic oscillation (BAO) data and the constraint from primordial black holes (PBHs).…
Signatures of Modified Dispersion Relation of Graviton in the Cosmic Microwave Background
Jun Li, Qing-Guo Huang
The dispersion relation of graviton is a fundamental issue for fundamental physics about gravity. In this paper we investigate how the modified dispersion relation of graviton affe…