377 citations · 1.4k across the 36 of their papers we have counts for
23 papers · 1 filter
Observational constraints on inflationary models with non-minimally derivative coupling by ACT
Qing Gao, Yanjiang Qian, Yungui Gong +1
The most recent data release from the Atacama Cosmology Telescope (ACT) reveals a larger value of the scalar spectral tilt , ruling out a broad class of inflationary attractor…
On the duality in constant-roll inflation
Yue Wang, Qing Gao, Shengqing Gao +1
There is a duality in the observables , and the inflaton potential between large and small for the constant-roll inflation if the slow-roll parameter is neglig…
Detecting new fundamental fields with Pulsar Timing Arrays
Chao Zhang, Ning Dai, Qing Gao +3
Strong evidence of the existence of the Stochastic Gravitational-Wave Background (SGWB) has been reported by the NANOGrav, PPTA, EPTA and CPTA collaborations. The Bayesian posterio…
Scalar induced gravitational waves in light of Pulsar Timing Array data
Zhu Yi, Qing Gao, Yungui Gong +2
The power-law parametrization for the energy density spectrum of gravitational wave (GW) background is a useful tool to study its physics and origin. While scalar induced secondary…
Probing the equation of state of neutron stars with captured primordial black holes
Qing Gao, Ning Dai, Yungui Gong +3
Gravitational waves (GWs) from primordial black holes (PBHs) inspiraling within neutron stars (NSs) -- should they exist -- are detectable by ground-based detectors and offer a uni…
Testing alternative theories of gravity with space-based gravitational wave detectors
Qing Gao, Yujie You, Yungui Gong +2
We use gravitational waves (GWs) from binary black holes (BBHs) and neutron stars inspiraling into intermediate-mass black holes to evaluate how accurately the future space-based G…
Constraint on the mass of graviton with gravitational waves
Qing Gao
We consider the effects of the mass of graviton on both the waveform of gravitational waves and the antenna response to gravitational waves. We find the effect on the response func…
Primordial black holes and secondary gravitational waves from chaotic inflation
Qing Gao
Chaotic inflation is inconsistent with the observational constraint at 68\% CL. Here, we show that the enhancement mechanism with a peak function in the noncanonical kinetic term n…
Primordial black holes and secondary gravitational waves from natural inflation
Qing Gao, Yungui Gong, Zhu Yi
The production of primordial black hole (PBH) dark matter (DM) and the generation of scalar induced secondary gravitational waves by using the enhancement mechanism with a peak fun…
The Upper Bound on the Tensor-to-Scalar Ratio Consistent with Quantum Gravity
Lina Wu, Qing Gao, Yungui Gong +2
We consider the polynomial inflation with the tensor-to-scalar ratio as large as possible which can be consistent with the Quantum Gravity (QG) corrections and Effective Field Theo…
The TianQin project: current progress on science and technology
Jianwei Mei, Yan-Zheng Bai, Jiahui Bao +103
TianQin is a planned space-based gravitational wave (GW) observatory consisting of three earth orbiting satellites with an orbital radius of about . The satellites w…
Full analytical formulas for frequency response of space-based gravitational wave detectors
Chunyu Zhang, Qing Gao, Yungui Gong +3
The discovery of gravitational waves, which are ripples of space-time itself, opened a new window to test general relativity, because it predicts that there are only plus and cross…
Primordial black holes and secondary gravitational waves from k/G inflation
Jiong Lin, Qing Gao, Yungui Gong +3
The possibility that in the mass range around most of dark matter constitutes of primordial black holes (PBHs) is a very interesting topic. To produce PBHs with…
Frequency response of time-delay interferometry for space-based gravitational wave antennas
Chunyu Zhang, Qing Gao, Yungui Gong +3
Space-based gravitational wave detectors cannot keep rigid structures and precise arm length equality, so the precise equality of detector arms which is required in a ground-based…
On the constant-roll inflation with large and small
Qing Gao, Yungui Gong, Zhu Yi
We study the seemingly duality between large and small for the constant-roll inflation with the second slow-roll parameter being a constant. In the previous studies, on…
The observational constraint on constant-roll inflation
Qing Gao
We discuss the constant-roll inflation with constant and constant . By using the method of Bessel function approximation, the analytical expressions for the scalar and…
Constant-roll tachyon inflation and observational constraints
Qing Gao, Yungui Gong, Qin Fei
For the constant-roll tachyon inflation, we derive the analytical expressions for the scalar and tensor power spectra, the scalar and tensor spectral tilts and the tensor to scalar…
Reconstruction of extended inflationary potentials for attractors
Qing Gao, Yungui Gong
We give the procedure to reconstruct the extended inflationary potentials for attractors and use the attractor and the constant-roll model as examples to show how to reconstruc…
The reconstruction of inflationary potentials
Jianmang Lin, Qing Gao, Yungui Gong
The observational data on the anisotropy of the cosmic microwave background constraints the scalar spectral tilt and the tensor to scalar ratio which depend on the first…
Inflationary models with non-minimally derivative coupling
Nan Yang, Qin Fei, Qing Gao +1
We derive the general formulae for the the scalar and tensor spectral tilts to the second order for the inflationary models with non-minimally derivative coupling without taking th…
The Phase-space analysis of scalar fields with non-minimally derivative coupling
Yumei Huang, Qing Gao, Yungui Gong
We perform a dynamical analysis for the exponential scalar field with non-minimally derivative coupling. For the quintessence case, the stable fixed points are the same with and wi…
Modified Lyth bound and implications of BICEP2 results
Qing Gao, Yungui Gong, Tianjun Li
To reconcile the BICEP2 measurement on the tensor-to-scalar ratio with Planck constraint, a large negative running of scalar spectral index is needed. So the inflationary…
The challenge for single field inflation with BICEP2 result
Qing Gao, Yungui Gong
The detection of B-mode power spectrum by the BICEP2 collaboration constrains the tensor-to-scalar ratio for the lensed-CDM model. The consistency of th…