Speaker
Description
Domain walls beyond the textbook Z₂ kink have been studied analytically and through effective models, but seldom simulated directly on the lattice. We close that gap, evolving Z₃ and Z₄ wall networks with CosmoLattice. These networks are qualitatively richer than Z₂: walls come in distinct species, meet along junctions, and can transmute into one another rather than simply annihilating. To capture this we develop a wall-counting algorithm for multi-component fields that separates each species, and use it to measure the late-time scaling area of each. In Z₄ the simulations directly exhibit a stability transition, where "opposite" walls split into pairs of "adjacent" walls, confirming our analytic prediction. Finally, we extend the velocity-dependent one-scale model from Z₂ to general Zₙ, encoding the reduced annihilation efficiency and junction friction so that the measured scaling plateaus feed directly into the network dynamics, and ultimately the gravitational-wave signal.