Scaling in Numerical Simulations of Domain Walls

Garagounis, Theodore and Hindmarsh, Mark (2003) Scaling in Numerical Simulations of Domain Walls. Physical Review D, 68 (10). p. 103506.

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We study the evolution of domain wall networks appearing after phase transitions in the early Universe. They exhibit interesting dynamical scaling behavior which is not yet well understood, and are also simple models for the more phenomenologically acceptable string networks. We have run numerical simulations in two- and three-dimensional lattices of sizes up to 4096^3. The theoretically predicted scaling solution for the wall area density A1/t is supported by the simulation results, while no evidence of a logarithmic correction reported in previous studies could be found. The energy loss mechanism appears to be direct radiation, rather than the formation and collapse of closed loops or spheres. We discuss the implications for the evolution of string networks.

Item Type: Article
Additional Information: Supervisor of research student Garagounis. We provided strong numerical evidence that domain walls (2-dimensional extended objects) have the important property of scaling or self-similarity, and lose energy directly, strengthening similar claims for 1-dimensional objects or cosmic strings.
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: Mark Hindmarsh
Date Deposited: 06 Feb 2012 20:05
Last Modified: 03 Jul 2019 01:18

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