442 citations · 2.5k across the 33 of their papers we have counts for
10 papers · 1 filter
Hyperbolic field space and swampland conjecture for DBI scalar
Shuntaro Mizuno, Shinji Mukohyama, Shi Pi +1
We study a model of two scalar fields with a hyperbolic field space and show that it reduces to a single-field Dirac-Born-Infeld (DBI) model in the limit where the field space beco…
Strongly Coupled Quasi-Single Field Inflation
Aditya Varna Iyer, Shi Pi, Yi Wang +2
We study the power spectrum of quasi-single field inflation where strong coupling is considered. The contribution from the massive propagator can be divided into local and non-loca…
Power-law modulation of the scalar power spectrum from a heavy field with a monomial potential
Qing-Guo Huang, Shi Pi
The effects of heavy fields modulate the scalar power spectrum during inflation. We analytically calculate the modulations of the scalar power spectrum from a heavy field with a se…
On the possibility of blue tensor spectrum within single field inflation
Yi-Fu Cai, Jinn-Ouk Gong, Shi Pi +2
We present a series of theoretical constraints on the potentially viable inflation models that might yield a blue spectrum for primordial tensor perturbations. By performing a deta…
Inflation beyond T-models and primordial B-modes
Yi-Fu Cai, Jinn-Ouk Gong, Shi Pi
We describe extended theories which shares the gauge transformation symmetry of the T-models, and takes the T-models as well as Starobinsky model as special cases. We derive a gene…
Equilateral non-Gaussianity from heavy fields
Jinn-Ouk Gong, Shi Pi, Misao Sasaki
The effect of self-interactions of heavy scalar fields during inflation on the primordial non-Gaussianity is studied. We take a specific constant-turn quasi-single field inflation…