5 papers
Astrophysical Graviton Squeezing Can Be Hidden in the Far-Field
Cheng-Jun Fang, Zong-Kuan Guo, Zhen-Hong Lyu +3
While localized astrophysical sources can generate macroscopic graviton squeezing, their observable quantum signatures at far-field detectors remain unresolved. In this work, we in…
Gravitational superfluorescence from superradiant axion clouds
Zhen-Hong Lyu, Rong-Gen Cai, Jing Liu
Boson clouds formed via superradiance around spinning black holes offer a novel probe of ultralight particles. We show that such gravitational atoms can undergo a self-stimulated a…
Ward Identity Constraints on Loop Corrections in Non-Attractor Inflation
Cheng-Jun Fang, Zhen-Hong Lyu, Chao Chen +1
The conservation of super-horizon curvature perturbations in strongly interacting inflationary models, particularly in the presence of quantum-loop corrections, remains a topic of…
Ring formation from black hole superradiance through repeated particle production on bound orbits
Zhen-Hong Lyu, Rong-Gen Cai, Zong-Kuan Guo +2
Ultralight bosonic fields around a rotating black hole can extract energy and angular momentum through the superradiant instability and form a dense cloud. We investigate the scena…
Incorporating Backreaction in One-Loop Corrections in Ultra-Slow-Roll Inflation
Cheng-Jun Fang, Zhen-Hong Lyu, Chao Chen +1
We investigate the one-loop quantum correction to the power spectrum of primordial curvature perturbations in the ultra-slow-roll (USR) inflationary scenario, incorporating the bac…