Shi Pi

activity

20092026

most citedGravitational Waves Induced by non-Gaussian Scalar Perturbations

442 citations · 2.5k across the 33 of their papers we have counts for

collaborators

Showing 2017Show all

3 papers · 1 filter

astro-ph.CO2017★ 277 cited

Scalaron from $R^{2}$ -gravity as a Heavy Field

Shi Pi, Ying-li Zhang, Qing-Guo Huang +1

We study a model of inflation in which a scalar field $χ$ is non-minimally coupled to Starobinsky's $R^{2}$ gravity. After transforming it to the Einstein frame, a new scalar field,…

hep-th2017★ 56 cited

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…

gr-qc2017★ 8 cited

Oscillating scalar fields in extended quintessence

Dan Li, Shi Pi, Robert J. Scherrer

We study a rapidly-oscillating scalar field with potential $V (ϕ) = k ∣ ϕ ∣^{n}$ nonminally coupled to the Ricci scalar $R$ via a term of the form $(1 - 8 π G_{0} ξ ϕ^{2}) R$ in the action. In…

Scalaron from R2-gravity as a Heavy Field

Strongly Coupled Quasi-Single Field Inflation

Oscillating scalar fields in extended quintessence

Scalaron from $R^{2}$ -gravity as a Heavy Field