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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    truthout 21 Jun 2021
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    Bitcoinist 21 Jun 2021
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    Covid: Bihar saw about 92,000 more deaths between January and May than same period in 2019

    The Wire 20 Jun 2021
    Bihar reluctant to put Covid-19 deaths on public domain ... The on Friday observed that the Bihar government was “most reluctant” to publish the official figure of Covid-19 deaths in a public domain, reported Live Law ... The state’s counsel had on June 12 said no law mandated disclosure of the number of deaths on the government’s website....
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    Deaths due to coronavirus have to be certified as Covid deaths, says Centre

    The Telegraph India 20 Jun 2021
    The Patna High Court on Saturday pulled up the Nitish Kumar government, observing that Bihar government's reluctance to put the state's Covid death toll in the public domain is uncalled for. "For whatever reasons, the state government is most reluctant to put the Covid death toll in the public domain....
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    Ghana Web 19 Jun 2021
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    Delco wants to acquire Don Guanella property via eminent domain for use as a park

    The Philadelphia Tribune 19 Jun 2021
    Delaware County wants to create a large park on the Don Guanella School property in Marple Township, hoping to acquire the 213 acres through eminent domain ... eminent domain ... Pennsylvania’s eminent domain law requires “equitable just compensation” be paid to the owners of the site....
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    Bihar govt's reluctance to put COVID death toll in public domain uncalled for: Patna HC

    Yahoo Daily News 18 Jun 2021
    Patna, Jun 18 (PTI) The Patna High Court on Friday observed that the Bihar government's reluctance to put the state's COVID death toll in the public domain is uncalled for ... 'For whatever reasons, the state government is most reluctant to put the COVID death toll in the public domain....
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    Twitter’s India woes worsen as police summon chief over viral video

    Arab News 18 Jun 2021
    The Central Government neither has the power to bestow, nor the power to “withdraw” the exemption from liabilityThe determination of the question whether Twitter is entitled to seek exemption from liability is solely within the domain of the Courts,” Delhi-based Ira Law firm said in a LinkedIn post this month....
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    Twitter's India woes worsen as police summon chief over viral video

    Dawn 18 Jun 2021
    “The central government neither has the power to bestow, nor the power to 'withdraw' the exemption from liability [...] The determination of the question whether Twitter is entitled to seek exemption from liability is solely within the domain of the courts,” Delhi-based Ira Law firm said in a LinkedIn post this month....
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    Legislature votes for public water authority

    LI Herald 18 Jun 2021
    The bill passed the Senate 63-0, and the Assembly, 149-0. The measure now awaits Gov ... The actual acquisition of NYAW’s assets by this new public authority could take years through eminent domain proceedings and negotiations. The legislation would, however, provide some immediate relief to ratepayers, if signed into law ... ....
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    LTMA authorizes legal filings for Waterford water line project easements

    Gettysburg Times 18 Jun 2021
    The Ligonier Township Municipal Authority (LTMA) board on Wednesday authorized its solicitor to file condemnation actions in court to help the authority acquire easements under eminent domain law for a handful of holdout properties along the path of a planned water line replacement and extension project in the Waterford area of the township ... .......
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    Let’s not ignore the small investor in going back to private

    Gulf News 17 Jun 2021
    The interests of the small investor are protected and an equal platform provided for such investors to take advantage of the undervaluation of assets that exist in real estate - or in any capital market domain. For such freedoms to exist, shareholder activism laws then move to the ......
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    6 Historically Black Beaches to Visit This Season

    The Tennessee Tribune 17 Jun 2021
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