5 papers · 1 filter
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…
Cosmological constraints on small-scale primordial non-Gaussianity
Jing-Zhi Zhou, Zhi-Chao Li, Di Wu
In contrast to the large-scale primordial power spectrum and primordial non-Gaussianity , which are strictly constrained, the small-scale $\math…
Can tensor-scalar induced GWs dominate PTA observations ?
Di Wu, Jing-Zhi Zhou, Yu-Ting Kuang +3
Observational constraints on small-scale primordial gravitational waves are considerably weaker than those on large scales. We focus on scenarios with significant primordial gravit…