7 papers
Subcritical bubble prehistory in weak first-order phase transition
Guangshang Chen, Yang Xiao, Jin Min Yang +1
Standard calculations of cosmological first-order phase transitions usually assume critical bubbles to nucleate on a homogeneous symmetric vacuum background. However, this assumpti…
Gravitational Wave Signature of Aspherical Bubbles Driven by Thermal Fluctuation
Ligong Bian, Guangshang Chen, Song Li +4
Cosmological first-order phase transitions are a well-motivated source of stochastic gravitational waves (GWs), but most predictions are made based on the highly idealized model of…
Worth the Effort? An Examination on the Effect of Higher Diligence Calculations of the Sound Shell Model
Fazlollah Hajkarim, Graham White, Yang Xiao
The gravitational wave spectrum arising from using the full velocity profile is well known to differ qualitatively from analytic fits to a broken power law. Former studies have sho…
Enhancing Phase Transition Calculations with Fitting and Neural Network
Ligong Bian, Hongxin Wang, Yang Xiao +3
The computation of bounce action in a phase transition involves solving partial differential equations, inherently introducing non-negligible numerical uncertainty. Deriving charac…
The Bubble Wall Velocity in Local Thermal Equilibrium and Energy Budget with Full Effective Potential
Zongguo Si, Hongxin Wang, Lei Wang +2
We develop a framework based on the full one-loop finite-temperature effective potential model, within which the bubble wall velocity is calculated using the local thermal equilibr…
Machine Learning Left-Right Breaking from Gravitational Waves
William Searle, Csaba Balázs, Yang Xiao +1
First-order phase transitions in the early universe can generate stochastic gravitational waves (GWs), offering a unique probe of high-scale particle physics. The Left-Right Symmet…