13 papers
Parity violating spectral dynamics of black holes in dynamical Chern-Simons gravity
Han-Wen Hu, Chen Lan, Zong-Kuan Guo
The paper investigates how parity‑violating gravito‑scalar coupling in dynamical Chern‑Simons gravity influences the spectral instabilities of black‑hole quasinormal modes, uncover…
Waveform stability of black hole ringdown with stochastic horizon structure
Han-Wen Hu, Cheng-Jun Fang, Zong-Kuan Guo
We examine the robustness of black hole ringdown to stochastic horizon-scale structure within an effective field framework in a proof-of-principle Schwarzschild setup.Consistent wi…
Parametric resonance amplification of gravitational waves in dynamical Chern-Simons gravity
Han-Wen Hu, Chen Lan, Zong-Kuan Guo
Within the effective field theory of dynamical Chern-Simons (dCS) gravity, we study parametric resonance amplification of gravitational waves driven by an oscillating environmental…
Fixing the Renormalization of Inflationary Loops via Ward Identities
Cheng-Jun Fang, Zong-Kuan Guo
Evaluating quantum loop corrections to curvature perturbations in non-attractor inflation presents theoretical ambiguities. A crucial aspect of this challenge lies in the unconstra…
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…
Nonminimally coupled quintessence with sign-switching interaction
Jia-Qi Wang, Rong-Gen Cai, Zong-Kuan Guo +3
We propose a new nonminimally coupled quintessence model to account for the late-time dark energy dynamics indicated by recent Dark Energy Spectroscopic Instrument (DESI) measureme…