Collapsing domain walls with ${\mathbb{Z}}_2$-violating coupling to thermalized fermions and their impact on gravitational wave detections

Qing-Quan Zeng, Xi He, Zhao-Huan Yu +1

We study the dynamics of domain walls formed through the spontaneous breaking of an approximate ${\mathbb{Z}}_2$ symmetry in a scalar field, focusing on their collapse under the infl…