574 citations · 3.8k across the 87 of their papers we have counts for
87 papers
One-loop tensor power spectrum from an excited scalar field during inflation
Atsuhisa Ota, Misao Sasaki, Yi Wang
We present a consistent one-loop calculation for the inflationary tensor power spectrum in the presence of an excited spectator scalar field using the in-in formalism. We find that…
Scale-invariant enhancement of gravitational waves during inflation
Atsuhisa Ota, Misao Sasaki, Yi Wang
The inflationary 1-loop tensor power spectrum from an excited spectator scalar field is calculated. Recent studies on primordial black holes suggest that the inflationary curvature…
Termination of Superradiance from a Binary Companion
Xi Tong, Yi Wang, Hui-Yu Zhu
We study the impact of a binary companion on black hole superradiance at orbital frequencies away from the gravitational-collider-physics (GCP) resonance bands. A superradiant stat…
Cosmological Standard Timers from Unstable Primordial Relics
Yi-Fu Cai, Chao Chen, Qianhang Ding +1
In this article we study a hypothetical possibility of tracking the evolution of our Universe by introducing a series of the so-called standard timers. Any unstable primordial reli…
Cutting Rule for Cosmological Collider Signals: A Bulk Evolution Perspective
Xi Tong, Yi Wang, Yuhang Zhu
We show that the evolution of interacting massive particles in the de Sitter bulk can be understood at leading order as a series of resonant decay and production events. From this…
Gravitational Collider Physics via Pulsar-Black Hole Binaries II: Fine and Hyperfine Structures are Favored
Xi Tong, Yi Wang, Hui-Yu Zhu
A rotating black hole can be clouded by light bosons via superradiance, and thus acquire an atom-like structure. If such a gravitational atom system is companioned with a pulsar, t…