91 citations · 855 across the 19 of their papers we have counts for
12 papers · 1 filter
Constraints on primordial curvature power spectrum with pulsar timing arrays
Zhi-Qiang You, Zhu Yi, You Wu
The stochastic signal detected by NANOGrav, PPTA, EPTA, and CPTA can be explained by the scalar-induced gravitational waves. In order to determine the scalar-induced gravitational…
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…
Primordial black holes and scalar-induced gravitational waves from the generalized Brans-Dicke theory
Zhu Yi
The power spectrum of the scalar-tensor inflation with a quadratic form Ricci scalar coupling function can be enhanced enough to produce primordia…
NANOGrav signal and LIGO-Virgo Primordial Black Holes from the Higgs field
Zhu Yi, Zong-Hong Zhu
We show that the NANOGrav signal can come from the Higgs field with a noncanonical kinetic term in terms of the scalar induced gravitational waves. The scalar induced gravitational…
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…
Primordial black holes and secondary gravitational waves from the Higgs field
Zhu Yi, Yungui Gong, Bin Wang +1
We devise a novel mechanism and for the first time demonstrate that the Higgs model in particle physics can drive the inflation to satisfy the cosmic microwave background observati…
Constraints on primordial curvature perturbations from primordial black hole dark matter and secondary gravitational waves
Yizhou Lu, Yungui Gong, Zhu Yi +1
Primordial black holes and secondary gravitational waves can be used to probe the small scale physics at very early time. For secondary gravitational waves produced after the horiz…
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…
Gauss-Bonnet inflation and swampland
Zhu Yi, Yungui Gong
The two swampland criteria are generically in tension with the single field slow-roll inflation because the first swampland criterion requires small tensor to scalar ratio while th…
Inflation with Gauss-Bonnet coupling
Zhu Yi, Yungui Gong, Mudassar Sabir
We consider inflationary models with the inflaton coupled to the Gauss-Bonnet term assuming a special relation between the two slow-roll parameters and . For…
Inflationary attractors from nonminimal coupling
Zhu Yi, Yungui Gong
We show explicitly how the E model attractor is obtained from the general scalar-tensor theory of gravity with arbitrary conformal factors in the strong coupling limit. By using co…
Thermodynamics of scalar-tensor theory with non-minimally derivative coupling
Yumei Huang, Yungui Gong, Dicong Liang +1
With the usual definitions for the entropy and the temperature associated with the apparent horizon, we show that the unified first law on the apparent horizon is equivalent to the…