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astro-ph.CO2026
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.…
astro-ph.CO2025
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…
astro-ph.CO2025
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…