BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Gravitational waves from slow cosmological phase transitions in an
  expanding Universe
DTSTART;VALUE=DATE-TIME:20260721T120000Z
DTEND;VALUE=DATE-TIME:20260721T130000Z
DTSTAMP;VALUE=DATE-TIME:20260728T004200Z
UID:indico-event-5184@indico-tdli.sjtu.edu.cn
DESCRIPTION:Speakers: Xiao Wang (Monash University)\n\nAbstract: We perfor
 m the first three-dimensional hydrodynamical simulations of cosmological f
 irst-order phase transitions in an expanding background. These simulations
  consistently incorporate the effects of the evolving phase transition str
 ength throughout the full nucleation process of slow phase transitions. We
  find that\, in addition to reducing mean bubble separations via an effect
 ively enhanced nucleation rate\, cosmic expansion unexpectedly induces hig
 hly nonlinear growth in the gravitational wave energy fraction\, ultimatel
 y leading to a significant O(10) to O(100) amplification of the gravitatio
 nal wave spectra. This amplification is more pronounced for initially weak
  transitions than for those of initially intermediate strength. Our result
 s highlight the challenge and importance of accurately modelling slow phas
 e transitions while accounting for cosmic expansion.Biography: Xiao Wang r
 eceived his PhD from the Institute of High Energy Physics\, Chinese Academ
 y of Sciences. After completing his doctorate in 2021\, he joined Sun Yat
 ‑sen University as a postdoctoral research fellow until 2023. He is now 
 a research fellow in the School of Physics and Astronomy at Monash Univers
 ity. His research focuses on the dynamics of cosmological first‑order ph
 ase transitions\, including bubble‑wall propagation and hydrodynamics tr
 iggered by expanding bubbles\, and their associated gravitational‑wave s
 ignatures. In particular\, he is currently working on precise modelling of
  thermal phase‑transition hydrodynamics and the gravitational waves prod
 uced by the resulting fluid evolution.Online Link Join Zoom Meetinghttps:/
 /caltech.zoom.us/j/3510113923Meeting ID: 351 011 3923No passcode\n\nhttps:
 //indico-tdli.sjtu.edu.cn/event/5184/
URL:https://indico-tdli.sjtu.edu.cn/event/5184/
END:VEVENT
END:VCALENDAR