Powered by Indico
v3.2.3
Abstract: First-order phase transitions (PTs) are conventionally driven by the nucleation of true-vacuum bubbles. However, a low nucleation rate can suppress the onset of PTs, while pre-existing domain walls (DWs) can significantly modify the PT dynamics. In this talk, we present a mechanism in which domain walls, destabilized by thermal fluctuations, classically transform into domain trenches of true vacuum, thereby enabling a successful first-order PT in the absence of bubble formation. We discuss the implementation of thermal fluctuations on the lattice and provide simulation results. Furthermore, we examine DW dynamics under frictional effects and explore its interplay with an alternative scenario in which domain walls act as impurities that catalyze bubble nucleation.
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.
Online Link: Join Zoom Meeting
https://caltech.zoom.us/j/3510113923
Meeting ID: 351 011 3923