Gravitational Waves and the Early Universe: Accelerated Expansion, Dynamical Inhomogeneity, and Beyond

Alexander Vikman, "Challenges in Modelling Domain Walls and Their Gravitational Wave Emission"

13 Mar 2026, 13:30

50m

ES635 (Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI), Nagoya University)

Description

I will discuss biased and melting domain walls (DW) and their resulting gravitational waves (GW). In particular, I will discuss recently identified subtle issues with initial and boundary conditions in numerical simulations of biased DW and how these issues influence resulting GW. Moreover, I will compare GW signatures of biased and recently introduced melting DW. This talk is based on e-Print: 2504.07902, e-Print: 2410.21971, e-Print: 2406.17053, e-Print: 2307.04582, e-Print: 2112.12608 and e-Print: 2104.13722.