4 papers
Hierarchical Gaussian-process test of DESI's dynamical dark-energy preference
Yu-Hao Mu, Zhihuan Zhou, Enkun Li
DESI DR2 BAO combined with CMB and Type~Ia supernovae in the Chevallier--Polarski--Linder (CPL) parameterisation prefers evolving dark energy over CDM at roughly --…
Geometric obstruction to resolving the Hubble tension: orthogonality of scale and shape in distance measurements
Zhihuan Zhou, Zhuang Miao, Sheng Bi +2
We identify a geometric obstruction to resolving the Hubble tension by combining early-time sound-horizon reduction with late-time smooth dark energy. Within CDM, the BAO--SN m…
Kinetically Coupled Scalar Fields Model and Cosmological Tensions
Gang Liu, Zhihuan Zhou, Yuhao Mu +1
In this paper, we investigate the kinetically coupled early dark energy (EDE) and scalar field dark matter to address cosmological tensions. The EDE model presents an intriguing th…
Cosmological Constraints on Thermal Friction of Axion Dark Matter
Gang Liu, Yuhao Mu, Zhihuan Zhou +1
In this paper, we investigate the process in which axion dark matter undergoes thermal friction, resulting in energy injection into dark radiation, with the aim of mitigating the H…