40 citations · 217 across the 25 of their papers we have counts for
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Primordial Black Holes from Vector-Induced Curvature Perturbations Sourced by Primordial Magnetic Fields
Chang Han, Zu-Cheng Chen, Hongwei Yu +1
Generating an appreciable abundance of primordial black holes (PBHs) requires a substantial enhancement of primordial curvature perturbations on small scales. In this work, we prop…
Infrared Behavior of Induced Gravitational Waves from Isocurvature Perturbations
Chang Han, Zu-Cheng Chen, Hongwei Yu +1
Induced gravitational waves provide a powerful probe of primordial perturbations in the early universe through their distinctive spectral properties. We analyze the spectral energy…
Resonant amplification of curvature perturbations in inflation model with periodical derivative coupling
Li-Yang Chen, Hongwei Yu, Puxun Wu
In this paper, we introduce a weak, transient and periodical derivative coupling between the inflaton field and gravity, and find that the square of the sound speed of the curvatur…
Power spectrum with growth for primordial black holes
Rongrong Zhai, Hongwei Yu, Puxun Wu
The decrease of both the rolling speed of the inflaton and the sound speed of the curvature perturbations can amplify the curvature perturbations during inflation so as to generate…
Cosmological Complexity from initial thermal state
Jincheng Wang, Hongwei Yu, Puxun Wu
The cosmological scalar perturbations should satisfy the thermal distribution at the beginning of inflation since the cosmic temperature is presumably very high. In this paper, we…