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Abstract:
The standard dynamics of first-order phase transitions (PTs) is driven by bubble nucleation. However, a low nucleation rate can impede the onset of such transitions, while pre-existing domain walls (DWs) can substantially alter the PT dynamics. In this talk, we will discuss a new mechanism in which domain walls, destabilized by thermal fluctuations, classically transform into domain trenches of true vacuum, enabling successful first-order PT without bubbles. We will also explore its synergy with the alternative scenario where domain walls, acting as impurities, catalyze bubble nucleation, based on DW dynamics under frictional effects.
Biography:
Dr. Yun Jiang, tenured Associate Professor, Ph.D. Supervisor, School of Physics and Astronomy, Sun Yat-sen University. He received his B.Sc. in Physics from Zhejiang University (2008), M.Sc. in High Energy Physics from the National University of Singapore (2011), and Ph.D. in High Energy Theory from UC Davis (2015). From 2015 to 2020, he held postdoctoral positions at the Niels Bohr Institute (Denmark), IFT-UAM (Spain), and the Max Planck Institute for Nuclear Physics (Germany).
His research lies in the frontier between beyond-Standard-Model physics and early-universe particle physics, particularly Higgs-related cosmology, the dynamics and lattice simulations of phase transitions and topological defects, and theoretical aspects of thermal field theory. He has published over 40 papers with more than 4,000 citations. He also participates as a key member in a National Key Research and Development Project on gravitational waves.
Alternative online link: https://meeting.tencent.com/dm/RCEU0eeTcpaI
ID:150894193