Domain wall
 | This article may be too technical for most readers to understand. (November 2016) |
A domain wall is a type of
sine-Gordon model or models with polynomial potentials.[1][2][3] Unstable domain walls can also appear if spontaneously broken discrete symmetry is approximate and there is a false vacuum
.
A domain (hyper volume) is extended in three spatial dimensions and one time dimension. A domain wall is the boundary between two neighboring domains. Thus a domain wall is extended in two spatial dimensions and one time dimension.
Important examples are:
- Domain wall (magnetism), an interface separating magnetic domains
- Domain wall (optics), for domain walls in optics
- Domain wall (string theory), a theoretical 2-dimensional singularity
Besides these important cases similar solitons appear in wide spectrum of the models. Here are other examples:
- Early in the universe, spontaneous breaking of discrete symmetries produced domain walls. The resulting network of domain walls influenced the late stages of cosmological inflation and the cosmic microwave background radiation. Observations constrain the existence of stable domain walls. Models beyond the Standard Modelcan account for those constraints. Unstable cosmic domain walls may decay and produce observable radiation.
- There exist a class of the The matter is localized due to the interaction with this configuration and can leave it at sufficiently high energies. The jargon term for this domain wall is "thick brane" in contrast to the "thin brane" of the models where it is described as delta-potential or simply as some ideal surface with matter fields on it.
References
- .
- S2CID 119333950.
- S2CID 54184500.
- ^ V. A. Rubakov and M. E. Shaposhnikov, Do we live inside a domain wall?, Physics Letters B 125 (1983), 136–138.
- ^ V. Dzhunushaliev, V. Folomeev, M. Minamitsuji, Thick brane solutions, Rept.Prog.Phys. 73 (2010).
Further reading
- Vachaspati, Tanmay (2006). Kinks and Domain Walls: An Introduction to Classical and Quantum Solitons. Cambridge University Press.
External links
The dictionary definition of domain wall at Wiktionary
 | This quantum mechanics-related article is a stub. You can help Wikipedia by expanding it. |
 | This physical cosmology-related article is a stub. You can help Wikipedia by expanding it. |
 | This condensed matter physics-related article is a stub. You can help Wikipedia by expanding it. |