377 citations · 1.4k across the 36 of their papers we have counts for
11 papers · 1 filter
Inflationary Models with Gauss-Bonnet Coupling in Light of ACT Observations
Yigan Zhu, Qing Gao, Yungui Gong +1
Recent analyses combining Atacama Cosmology Telescope (ACT) data with other cosmological datasets report a higher scalar spectral index , creating tension with a wide range of…
Approximate reconstruction of inflationary potential with ACT observations
Zhu Yi, Xingzhi Wang, Qing Gao +1
The Atacama Cosmology Telescope (ACT) has recently reported updated measurements of the scalar spectral index , revealing a tension with the predictions of many conventional i…
Non-minimal coupling in light of ACT
Qing Gao, Yungui Gong, Zhu Yi +1
The latest ACT data release disfavors the attractor . In inflationary models with nonminimal coupling, such attractors typically arise in the strong coupling limit. To a…
Null tests with Gaussian Process
Shengqing Gao, Qing Gao, Yungui Gong +1
We investigate the null tests of spatial flatness and the flat CDM model using the Baryon Acoustic Oscillation (BAO) data measured by the Dark Energy Spectroscopic Instrument (D…
On the evidence of dynamical dark energy
Qing Gao, Zhiqian Peng, Shengqing Gao +1
To elucidate the robustness of the baryon acoustic oscillation (BAO) data measured by the Dark Energy Spectroscopic Instrument (DESI) in capturing the dynamical behavior of dark en…
Primordial black holes and secondary gravitational waves from inflationary model with a non-canonical kinetic term
Zhu Yi, Qing Gao, Yungui Gong +1
With the enhancement mechanism provided by a noncanonical kinetic term with a peak, the amplitude of primordial curvature perturbations can be enhanced by seven orders of magnitude…
Reconstruction of constant slow-roll inflation
Qing Gao
By using the relations between the slow-roll parameters and the power spectrum for the single field slow-roll inflation, we derive the scalar spectral tilt and the tensor to…
The tension on the cosmological parameters from different observational data
Qing Gao, Yungui Gong
Planck measurements of the cosmic microwave background power spectra find a lower value of the Hubble constant and a higher value of the fractional matter energy density $Ω_{…
On the effect of the degeneracy between w_0 and w_a
Yungui Gong, Qing Gao
The dynamics of scalar fields as dark energy is well approximated by some general relations between the equation of state parameter and the fraction energy density . Ba…
Constraints on thawing scalar field models from fundamental constants
Qing Gao, Yungui Gong
We consider a dark energy model with a relation between the equation of state parameter and the energy density parameter derived from thawing scalar field models. Assumin…
The effect of different observational data on the constraints of cosmological parameters
Yungui Gong, Qing Gao, Zong-Hong Zhu
The constraints on the CDM model from type Ia supernova (SNe Ia) data alone and BAO data alone are similar, so it is worthwhile to compare their constraints on the property of d…