5 papers
Inflation on the lattice: scalar Gauss-Bonnet single field inflation
Fei-Yu Chen, Jing-Zhi Zhou, Zhi-Chao Li +1
We use lattice methods to study inflation in the scalar Gauss-Bonnet (SGB) gravity theory. We focus on the ultra-slow-roll scenario with the peak frequency falls into the PTA band.…
Tensor induced gravitational waves
Fei-Yu Chen, Jing-Zhi Zhou, Di Wu +2
Primordial gravitational waves on small scales are not tightly constrained by current cosmological observations, which allows for the possibility of large amplitudes at small scale…
Probing small-scale primordial power spectra with induced gravitational waves
Di Wu, Zhi-Chao Li, Peng-Yu Wu +2
Large-scale primordial perturbations have been well constrained by current cosmological observations, but the properties of small-scale perturbations remain elusive. This study foc…
Holographic Weyl Anomaly in 8d from General Higher Curvature Gravity
Fei-Yu Chen, H. Lu
We calculate the holographic central charges for general higher curvature gravity theory dual to eight dimensional CFT. To do this, we first elaborate the general form of Weyl anom…
Scalar induced gravitational waves in f(R) gravity
Jing-Zhi Zhou, Yu-Ting Kuang, Di Wu +3
We investigate the first and second order cosmological perturbation equations in f(R) modified gravity theory and provide the equation of motion of second order scalar induced grav…