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Abstract
I will introduce a new model-independent approach to determine the bubble wall velocity by virtue of an extra junction condition from the conservation and violation of the total number density current across the shock front (if any) and bubble wall, respectively. This is different from the previous approach using the entropy current conservation, which is only valid in the realistic case (continuous wave) for the realistic model (non-bag EoS) as tested in numerical simulations. If we stick to the ideal case with both thin-wall approximation (discontinuous wave) and bag EoS, we should consider the conservation/violation of total number density current, including the contributions not only from plasma fluids but also from the transition scalar field.
Biography
Shao-Jiang Wang is an Associate Researcher of the Institute of Theoretical Physics, Chinese Academy of Sciences (ITP-CAS) since 2023. Born in 1991, 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. With over 60 publications and 3800 citations, his research spans a wide range in cosmology, gravitation, and particle physics. He has held an Associated Fellow in APCTP (2023-2028) and served as Young Editorial Board in《Research》(the first AAAS/Science Partner Journal). He has also hosted as a Principal Investigator for both Youth Science Fund C (2022-2024) and Youth Science Fund B (2025-2027) from the National Natural Science Foundation of China.
Online link: Wednesday https://meeting.tencent.com/dm/imuDLPg8CblI Meeting ID: 139277423 No password