Speaker
Bowen Fu
(Northeastern University, China)
Description
Domain walls are two-dimensional topological defects generated when a discrete symmetry is broken during phase transitions in the early universe. The collapse of domain walls can emit gravitational waves that can be observed by interferometers. The simplest and most well-studied domain walls are from $Z_2$ symmetry breaking. However, the breaking of larger non-Abelian discrete symmetries can also lead to domain wall formation. These domain walls from non-Abelian discrete symmetries are called the non-Abelian domain walls. By discussing $A_4$ and $S_4$ breaking as examples, we study the variety, property and dynamics of non-Abelian domain walls.
Author
Bowen Fu
(Northeastern University, China)