574 citations · 3.8k across the 87 of their papers we have counts for
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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…
Chemical-Potential-Assisted Particle Production in FRW Spacetimes
Chon Man Sou, Xi Tong, Yi Wang
We analyze gravitational particle production assisted by chemical potential. By utilizing the uniformly smoothed Stokes-line method and Borel summation, we gain insight into the fi…
A Bit Rate Bound on Superluminal Communication
Xi Tong, Yi Wang, Yuhang Zhu
We study semi-classical communication in positivity-violating k-essence scalar field theories, with superluminal modes propagating on a rolling background. The self-interactions du…
Non-Standard Primordial Clocks from Dynamical Mass in Alternative to Inflation Scenarios
Yi Wang, Zun Wang, Yuhang Zhu
In the primordial universe, oscillations of heavy fields can be considered as standard clocks to measure the expansion or contraction history of the universe. Those standard clocks…
A Cosmological Higgs Collider
Shiyun Lu, Yi Wang, Zhong-Zhi Xianyu
The quantum fluctuations of the Higgs field during inflation could be a source of primordial density perturbations through Higgs-dependent inflaton decay. By measuring primordial n…
An Inflationary Probe of Cosmic Higgs Switching
JiJi Fan, Matthew Reece, Yi Wang
A scalar Higgs field can be repeatedly switched on and off when it couples to a classically oscillating scalar modulus field. The modulus flips the Higgs mass term between stable a…