Speaker
Description
Domain walls arise in theories where a discrete symmetry is spontaneously broken, a mechanism that appears in a wide range of high-energy physics models and makes the formation of domain walls in the early Universe a well-motivated possibility. In this work, we study the evolution of domain wall networks by analysing their scaling regime, an attractor solution in which the network evolves self-similarly, allowing the extrapolation of numerical results to cosmological scales. Our objective is to accurately characterise this regime through lattice field simulations, focusing on the evolution of key network observables such as the area parameter and the root-mean-square (RMS) velocity. A precise understanding of scaling behaviour is a necessary step towards studying the collapsing domain wall networks, as such defects must be efficiently destroyed if produced in the early Universe.