12 papers
Dark Matter Production from Bubble Collisions during a First-Order Phase Transition at the End of Inflation
Zihong Cheng, Fa Peng Huang
We study whether a first-order phase transition at the end of inflation can generate the observed dark matter abundance through bubble collisions. The transition occurs in a specta…
Freeze-in gravitational waves and dark matter in warm inflation
Quan Chen, Siyu Jiang, Dayun Qiu +2
Recent study [1] has suggested that warm inflation may be realized with a minimal extension of the Standard Model by a single scalar inflaton field with an axion-like coupling to g…
A New Source of Phase Transition Gravitational Waves: Heavy Particle Braking Across Bubble Walls
Dayun Qiu, Siyu Jiang, Fa Peng Huang
Motivated by the new heavy dark matter production mechanism from cosmic phase transition, we propose a novel mechanism for the generation of microscopic gravitational waves (GWs) d…
Rapid post-merger gravitational-wave signals from magnetic black hole superradiance: novel approach to detect magnetic monopole and ultralight boson
Zhong-Hao Luo, Fa Peng Huang, Pengming Zhang +1
We present an analytic framework showing that a spinning black hole with net magnetic charge exhibits a greatly enhanced superradiant instability against charged scalar fields comp…
New dark matter production mechanism and the gravitational wave signals
Fa Peng Huang
The microscopic origin and production mechanism of dark matter (DM) remain central questions in cosmology and particle physics. While thermal freeze-out has long dominated DM model…
Macroscopic Dark Matter under siege: from White Dwarf Data to Gravitational Wave Detection
Siyu Jiang, Aidi Yang, Fa Peng Huang
The nature of dark matter (DM) remains a profound mystery. Macroscopic candidates, such as Fermi-balls, offer a distinct alternative to conventional particle DM, yet their low numb…