1.5k citations · 10.6k across the 150 of their papers we have counts for
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Have pulsar timing array methods detected a cosmological phase transition?
Andrea Addazi, Yi-Fu Cai, Antonino Marciano +1
We show that the recent detection of a gravitational wave (GW) background reported by various pulsar timing array (PTA) collaborations including NANOGrav-15yr, PPTA, EPTA, and CPTA…
Highly non-Gaussian tails and primordial black holes from single-field inflation
Yi-Fu Cai, Xiao-Han Ma, Misao Sasaki +2
For primordial perturbations, deviations from Gaussian statistics on the tail of the probability distribution can be associated with non-perturbative effects of inflation. In this…
Gaussian processes and effective field theory of gravity under the tension
Xin Ren, Sheng-Feng Yan, Yaqi Zhao +2
We consider the effective field theory formulation of torsional gravity in a cosmological framework to alter the background evolution. Then we use the latest measurement from…
Beating the Lyth bound by parametric resonance during inflation
Yi-Fu Cai, Jie Jiang, Misao Sasaki +2
We propose a novel mechanism for enhancing the primordial gravitational waves without significantly affecting the curvature perturbations produced during inflation. This is achieve…
Ultrahigh-energy Gamma Rays and Gravitational Waves from Primordial Exotic Stellar Bubbles
Yi-Fu Cai, Chao Chen, Qianhang Ding +1
We put forward a novel class of exotic celestial objects that can be produced through phase transitions occurred in the primordial Universe. These objects appear as bubbles of stel…
Deflection angle and lensing signature of covariant f(T) gravity
Xin Ren, Yaqi Zhao, Emmanuel N. Saridakis +1
We calculate the deflection angle, as well as the positions and magnifications of the lensed images, in the case of covariant gravity. We first extract the spherically symme…