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:

  • 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:

  • Spontaneous breaking of discrete symmetries at early cosmological epochs can produce domain wall. Formation of domain wall network influence on the late stages of cosmological inflation and the cosmic microwave background radiation. Observations impose severe constraints on the existence of stable domain walls. Those constraints should be accounted for by the models of the beyond Standard Model physics. Unstable cosmic domain walls decay also should produce potentially observable radiation.
  • Latest News for: Domain laws

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    Toronto Sun 24 Aug 2019
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    Nebraska Supreme Court upholds route of controversial Keystone XL pipeline

    The North Platte Telegraph 23 Aug 2019
    She said that her group will urge landowners to fight TC Energy's use of eminent domain in local courts, and urge the Nebraska Legislature to change "backward" laws that allow a foreign corporation to obtain right of way in court from private landowners....
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    Koreans fear Fukushima radioactive water dump

    Asiatimes 23 Aug 2019
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    Naval chief inaugurates special training centre

    Dawn 22 Aug 2019
    ... agencies (LEAs) and friendly countries in different professional domains, including counterterrorism....
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    In a first, women to drive Kerala government vehicles

    Gulf News 21 Aug 2019
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    Sun Star 21 Aug 2019
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    SB316 not a license to 'cut open gates'

    Elko Daily Free Press 21 Aug 2019
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    Cronyism a drag on NC freedsom

    The Robesonian 20 Aug 2019
    They include minimum markup laws for gasoline or other products, CON requirements, certificates of convenience and necessity for home movers, bans on direct auto sales, occupational licensing rules, lax eminent domain laws, bans on direct shipment of wine, and “blue laws” for alcohol sales....
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    The Times of India 20 Aug 2019
    ... institute in recognition of their contributions and achievements in respective domains ranging from entrepreneurship, public welfare service, civic and law enforcement activities, film-making, academia and research....
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    ‘IITs should not worry too much about rankings’

    Indian Express 19 Aug 2019
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    Generation start-up: renewables firm Libra Project has a Facebook name challenge

    The National 18 Aug 2019
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    Eminent domain valid

    The Scranton Times-Tribune 17 Aug 2019
    Use of eminent domain often is controversial because American society highly values private property as matters of custom, law and constitutional right. So a government’s invocation of eminent domain to take private property is a big deal .......
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    The law vs freedom of religion

    DNA India 17 Aug 2019
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