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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" for possible deviations from the $\Lambda$CDM model, which seems to be violated due to recent update from DES. 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.
Short-bio:
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 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《Research》(the first AAAS/Science Partner Journal). With over 60 publications and 4300 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.
Tencent Meeting: 738-786-394
Shanming Ruan