90 citations · 379 across the 8 of their papers we have counts for
9 papers
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…
Power spectrum of primordial perturbations during ultra-slow-roll inflation with back reaction effects
Shu-Lin Cheng, Da-Shin Lee, Kin-Wang Ng
We develop a nonperturbative method through the Hartree factorization to examine the quantum fluctuation effects on the single-field inflationary models in a spatially flat FRW cos…
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…
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…
Primordial black holes and associated gravitational waves in axion monodromy inflation
Shu-Lin Cheng, Wolung Lee, Kin-Wang Ng
In the axion monodromy inflation, the inflation is driven by the axion with super-Planckian field values in a monomial potential with superimposed sinusoidal modulations. The coupl…
Production of high stellar-mass primordial black holes in trapped inflation
Shu-Lin Cheng, Wolung Lee, Kin-Wang Ng
Trapped inflation has been proposed to provide a successful inflation with a steep potential. We discuss the formation of primordial black holes in the trapped inflationary scenari…
A numerical study of pseudoscalar inflation with an axion-gauge field coupling
Shu-Lin Cheng, Wolung Lee, Kin-Wang Ng
A numerical study of a pseudoscalar inflation having an axion-photon-like coupling is performed by solving numerically the coupled differential equations of motion for inflaton and…
A Global Trace Formula for Reductive Lie Algebras and the Harish-Chandra Transform on the Space of Characteristic Polynomials
Shuyang Cheng
In this paper an integral transform between spaces of nonstandard test functions on the affine space of dimension n is constructed. The integral transform satisfies a summation for…
Inflationary dilaton-axion magnetogenesis
Shu-Lin Cheng, Wolung Lee, Kin-Wang Ng
We discuss the generation of primordial magnetic fields during inflation in the dilaton-axion electromagnetism, in which the dilaton and axion dynamics are introduced in terms of t…