Hubble tension, dark energy, and modified gravity
Info:
| Author | 王少江 副研究员 |
|---|---|
| Affiliation | 中国科学院理论物理研究所 |
| Time | 2026-09-15 15:00 |
| Location | 紫台仙林园区3-402室 |
| Presentation materials | Download |
报告摘要:
Recently, various cosmological tensions have arisen for the standard model of cosmology. For the Hubble-constant $H_0$ tension, we have proposed a series of no-go “theorems” to largely rule out purely late-time solutions of any non-metric gravity. For the intercept $a_B$ tension we proposed from the magnitude-redshift relation, we have developed a diagnostic for systematics of supernovae to narrow down the formulation of the Hubble tension and the evidence of dynamical dark energy. For recent hint of dynamical dark energy, we have proposed a specific interacting dark matter-dark energy model to mimic the phantom crossing as a mis-modeling artifact, and we also resolve the $Omega_m$ tension among Planck-CMB, DESI-BAO, and DES-SNe for both $Lambda$CDM and $w_0w_a$CDM models. In the end, we further generalize our model to address the Hubble-variation $delta H_0$ tension with novel evidence of going beyond the general relativity in the $Lambda$CDM model.
报告人简介:
Shao-Jiang Wang is an Associate Researcher of the Institute of Theoretical Physics, Chinese Academy of Sciences (ITP-CAS) since 2023. He obtained his PhD at ITP-CAS in 2018, after that, he spent two years at the Tufts University in Boston as a postdoctoral researcher, and another two years at ITP-CAS as a Special Research Assistant (Postdoc). He has also held an Associated Fellow in Asia Pacific Center for Theoretical Physics (APCTP) from 2023 to 2028, and served as the Young Editorial Board in National Science Open, Science Bulletin, and《Research》(the first AAAS/Science Partner Journal). He has acted as the Principal Investigator for two Youth Science Funds from National Natural Science Foundation of China, and participated as the key member of one Special Fund for Theoretical Physics of NSFC and two National Key Research and Development Programs from the Ministry of Science and Technology of China. With over 70 publications and 5600 citations, his research spans a wide range in cosmology, gravitation, and particle physics, in particular, the gravitational waves, Hubble tension, dark energy in recent years.