Domain wall

A domain wall is a type of topological soliton that occurs whenever a discrete symmetry is spontaneously broken. Domain walls also sometimes called kinks in analogy with closely related kink solution of the sine-Gordon model. Unstable domain walls can also appear if spontaneously broken discrete symmetry is approximate and there is the metastable 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:

Besides these important cases similar solitons appear in wide spectrum of the models. Here are other examples:

References

  1. V. A. Rubakov and M. E. Shaposhnikov, Do we live inside a domain wall?, Physics Letters B 125 (1983), 136–138.
  2. V. Dzhunushaliev, V. Folomeev, M. Minamitsuji, Thick brane solutions, Rept.Prog.Phys. 73 (2010).

Further reading

External links

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