2k citations · 6.6k across the 117 of their papers we have counts for
8 papers · 1 filter
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…
Strong Equivalence Principle and Gravitational Wave Polarizations in Horndeski Theory
Shaoqi Hou, Yungui Gong
The relative acceleration between two nearby particles moving along accelerated trajectories is studied, which generalizes the geodesic deviation equation. The polarization content…
Gravitational waves in Einstein-Æther theory and generalized TeVeS theory after GW170817
Shaoqi Hou, Yungui Gong
In this paper, the polarization contents of Einstein-æther theory and the generalized TeVeS theory are studied. The Einstein-æther theory has five polarizations, while the generali…
Gravitational waves and the polarizations in Hořava gravity after GW170817
Yungui Gong, Shaoqi Hou, Eleftherios Papantonopoulos +1
The gravitational waves of Hořava gravity, their polarization states and their possible observational signatures are discussed. Using the gauge-invariant variable formalism, we fou…
The Polarizations of Gravitational Waves
Yungui Gong, Shaoqi Hou
The direct detection of gravitational waves by LIGO/Virgo opened the possibility to test General Relativity and its alternatives in the high speed, strong field regime. Alternative…
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…
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…
Gravitational waves in Einstein-æther and generalized TeVeS theory after GW170817
Yungui Gong, Shaoqi Hou, Dicong Liang +1
In this work, we discuss the polarization contents of Einstein-æther theory and the generalized tensor-vector-scalar (TeVeS) theory, as both theories have a normalized timelike vec…