28 citations · 61 across the 8 of their papers we have counts for
8 papers
How Dilatation Invariance Suppresses Loop Corrections to Curvature Perturbations on CMB Scales
Danilo Artigas, Shi Pi, Takahiro Tanaka +1
Departures from standard slow-roll (SR) inflation have attracted increasing interest in recent years. In particular, scenarios that strongly enhance the power spectrum of the curva…
On the survival of strong nuggets in the early Universe
Haoyang Qi, Wen-Li Yuan, Yudong Luo +3
Strong nuggets with a baryon number of could be able to survive from the cosmic separation of the QCD phases, provided the transition from strange quark matter t…
Inflationary relics from an Ultra-Slow-Roll plateau
Albert Escrivà, Jaume Garriga, Shi Pi
We investigate the formation of primordial black holes (PBHs) in inflationary scenarios featuring an ultra-slow-roll (USR) plateau with a sharp transition to slow roll. We focus on…
Primordial black holes and induced gravitational waves from logarithmic non-Gaussianity
Ryoto Inui, Cristian Joana, Hayato Motohashi +3
We investigate the formation of primordial black hole (PBH) based on numerical relativity simulations and peak theory as well as the corresponding scalar induced gravitational wave…
Constant roll and non-Gaussian tail in light of logarithmic duality
Ryoto Inui, Hayato Motohashi, Shi Pi +2
The curvature perturbation in a model of constant-roll (CR) inflation is interpreted in view of the logarithmic duality discovered in Ref. [1] according to the formalism. We c…
Secondary Gravitational Waves in Non-local Starobinsky inflation
Andrea Addazi, Alexey S. Koshelev, Shi Pi +1
We show how infinite derivative modifications of gravity impact on the stochastic background of Gravitational Waves from early Universe. The generic property of the ghost-free theo…
Extended formalism: Nonspatially Flat Separate Universe Approach
Danilo Artigas, Shi Pi, Takahiro Tanaka
The formalism is a powerful approach to compute non-linearly the large-scale evolution of the comoving curvature perturbation . It assumes a set of FLRW patches that evolve…
Non-Gaussianities and Primordial Black Holes
Shi Pi
The most promising mechanism of generating PBHs is by the enhancement of power spectrum of the primordial curvature perturbation, which is usually accompanied by the the enhancemen…