3 papers
astro-ph.CO2023
Primordial perturbations from ultra-slow-roll single-field inflation with quantum loop effects
Shu-Lin Cheng, Da-Shin Lee, Kin-Wang Ng
It is known that the single-field inflation with a transient ultra-slow-roll phase can produce a large curvature perturbation at small scales for the formation of primordial black…
math.RT2020
On the Mirabolic Trace Formula for
Shuyang Cheng
In this paper, a Chaudouard type trace formula is established for the Lie algebra , by integrating the Lie algebra analogue of the Selberg kernel function against…
astro-ph.CO2018
Superhorizon curvature perturbation in ultra-slow-roll inflation
Shu-Lin Cheng, Wolung Lee, Kin-Wang Ng
We study the growth of superhorizon modes in the curvature perturbation during an ultra-slow-roll or a large- phase in single-field inflation. In a simple toy model, we derive t…