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Fast Radio Bursts From Primordial Black Hole Binaries Coalescence
Can-Min Deng, Yifu Cai, Xue-Feng Wu +1
In this paper we propose the model that the coalescence of primordial black holes (PBHs) binaries with equal mass g can emit luminous gigahertz (GHz) radio transien…
Numerical study of inflationary preheating with arbitrary power-law potential and a realization of curvaton mechanism
Jie Jiang, Qiuyue Liang, Yi-Fu Cai +2
During inflationary preheating, the energy stored in the inflaton field is rapidly converted into excitations of other entropy fields. This stage is characterized by exponential pa…
Evading the theoretical no-go theorem for nonsingular bounces in Horndeski/Galileon cosmology
Shreya Banerjee, Yi-Fu Cai, Emmanuel N. Saridakis
We show that a nonsingular bounce, free of ghosts and gradient instabilities, can be realized in the framework of Horndeski or generalized Galileon cosmology. In particular, we fir…
Low-Temperature Enhancement of Semi-annihilation and the AMS-02 Positron Anomaly
Yi Cai, Andrew Spray
Semi-annihilation is a generic feature of particle dark matter that is most easily probed by cosmic ray experiments. We explore models where the semi-annihilation cross section is…
Primordial Black Holes from Sound Speed Resonance during Inflation
Yi-Fu Cai, Xi Tong, Dong-Gang Wang +1
We report on a novel phenomenon of the resonance effect of primordial density perturbations arisen from a sound speed parameter with an oscillatory behavior, which can generically…
Constraints on a Spin-Dependent Exotic Interaction between Electrons with Single Electron Spin Quantum Sensors
Xing Rong, Man Jiao, Jianpei Geng +6
A new laboratory bound on the axial-vector mediated interaction between electron spins at micrometer scale is established with single nitrogen-vacancy (NV) centers in diamond. A si…