Effects of Biases in Domain Wall Network Evolution

Understand

We study the evolution of various types of biased domain wall networks in the early universe.

• We carry out larger numerical simulations than currently available in the literature and provide a more detailed study of the decay of these networks, in particular by explicitly measuring velocities in the simulations.
• We also use the larger dynamic range of our simulations to test previously suggested decay laws for these networks, including an ad-hoc phenomenological fit to earlier simulations and a decay law obtained by Hindmarsh through analytic arguments.
• We find the latter to be in good agreement with simulations in the case of a biased potential, but not in the case of biased initial conditions.