300 citations · 2k across the 36 of their papers we have counts for
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WIMPs during Reheating
Nicolás Bernal, Yong Xu
Weakly Interacting Massive Particles (WIMPs) are among the best-motivated dark matter candidates. In the standard scenario where the freeze-out occurs well after the end of inflati…
Large Field Polynomial Inflation: Parameter Space, Predictions and (Double) Eternal Nature
Manuel Drees, Yong Xu
Simple monomial inflationary scenarios have been ruled out by recent observations. In this work we revisit the next simplest scenario, a single--field model where the scalar potent…
Higher-order Topological Hyperbolic Lattices
Yu-Liang Tao, Yong Xu
A hyperbolic lattice allows for any -fold rotational symmetry, in stark contrast to a two-dimensional crystalline material, where only twofold, threefold, fourfold or sixfold ro…
Elementary excitations in a spin-orbit-coupled spin-1 Bose-Einstein condensate
Yuanyuan Chen, Hao Lyu, Yong Xu +1
While a spin-orbit-coupled spin-1 Bose-Einstein condensate has been experimentally observed, its elementary excitations remain unclear in the stripe phase. Here, we systematically…
Superradiant Production of Heavy Dark Matter from Primordial Black Holes
Nicolás Bernal, Yuber F. Perez-Gonzalez, Yong Xu
Rotating black holes (BHs) can efficiently transfer energy to the surrounding environment via superradiance. In particular, when the Compton length of a particle is comparable to t…
Ultraviolet Freeze-in with a Time-dependent Inflaton Decay
Basabendu Barman, Nicolás Bernal, Yong Xu +1
It is typically assumed that during reheating the inflaton decays with a constant decay width. However, this is not guaranteed and can have a strong impact on the dark matter (DM)…