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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    China in full swing to enhance IPR protection

    China Daily 03 Dec 2020
    The arrangement covers detailed measures for various key domains, including making IPR protection more law-based, strengthening the whole-chain IPR protection, deepening the reform of IPR protection mechanisms and systems, promoting international cooperation and competition in IPR and safeguarding national security in the IPR field....
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    China in full swing to enhance IPR protection as it boosts innovation, creativity

    Sina 03 Dec 2020
    The arrangement covers detailed measures for various key domains, including making IPR protection more law-based, strengthening the whole-chain IPR protection, deepening the reform of IPR protection mechanisms and systems, promoting international cooperation and competition in IPR and safeguarding national security in the IPR field....
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    Commentary: China in full swing to enhance IPR protection as it boosts innovation, creativity

    People Daily 03 Dec 2020
    The arrangement covers detailed measures for various key domains, including making IPR protection more law-based, strengthening the whole-chain IPR protection, deepening the reform of IPR protection mechanisms and systems, promoting international cooperation and competition in IPR and safeguarding national security in the IPR field....
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    Washington landlords and tenants' demands for relief grow louder as back rent mounts

    Sunnyside Daily Sun 03 Dec 2020
    The state law under which the moratorium operates, plaintiffs argue, ... They argue the state has required landlords to provide free goods and services, "essentially mandating that their property be used for private use by tenants" in violation of Washington's eminent domain laws....
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    Delhi Assembly peace panel moves SC for intervention in Facebook VP’s case

    Indian Express 03 Dec 2020
    On October 15, the Centre had told the top court that proceedings of the Peace and Harmony committee is “without jurisdiction” as the issue pertained to law and order. It had said that “public order and police are not within the domain of the Delhi Legislative Assembly and therefore this proceeding is without jurisdiction....
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    Federal agency refuses to extend construction deadline for National Fuel pipeline

    The Buffalo News 02 Dec 2020
    National Fuel has won every lawsuit over the pipeline so far, winning eminent domain rights to take land along the route, overcoming a Pendleton law that would have impeded the construction of two gas compressors in that Niagara County town, and defeating the DEC over its refusal to grant the stream crossing permit....
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    Ishaq Dar grilled in BBC interview about his assets

    Dawn 02 Dec 2020
    STEPHEN Sackur in conversation with PML-N leader Ishaq Dar. LONDON ...It’s all declared in my tax returns. Everything is accounted for.”. Ex-finance minister demands fresh elections, supremacy of law ... “Our ultimate aim is free and fair election, transparency, rule of law, supremacy of parliament, and that all institutions work within their domain.” ... ....
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    Nawaz Sharif fighting for civilian supremacy: Ishaq Dar

    The News International 02 Dec 2020
    LONDON. Former finance minister and a close aide of ex-prime minister Nawaz Sharif, Ishaq Dar has said he owns only one property in Pakistan and that too has been seized by the government ... He said that the opposition’s ultimate aim was "supremacy of democracy" and the rule of law, calling upon all institutions to work within their domain. APP adds ... ....
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    Ishaq Dar faces tough questions in BBC interview

    The News International 02 Dec 2020
    LONDON. Former finance minister and a close aide of ex-prime minister Nawaz Sharif, Ishaq Dar has said he owns only one property in Pakistan and that too has been seized by the government ... He said that the opposition’s ultimate aim was "supremacy of democracy" and the rule of law, calling upon all institutions to work within their domain. APP adds ... ....
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    Nominet suspends thousands of dodgy .UK domains null

    TechRadar 01 Dec 2020
    Despite the efforts of cybercriminals to exploit the pandemic, 2020 has been a good year, in general, for Nominet and law enforcement officials with regard to rogue domain registrations. . The number of .UK domains suspended following requests by law enforcement agencies ......
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    S'pore, China courts launch book at legal roundtable

    Straits Times 01 Dec 2020
    ... cases from both countries, as a symbol of their commitment to pursue mutual understanding of each other's laws and legal systems ... There are plans to make the book available in the public domain as an introduction to the commonalities between the commercial laws of both nations....
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    Singapore, China launch book on commercial court cases to symbolise pursuit of mutual understanding

    Straits Times 01 Dec 2020
    ... cases from both countries, as a symbol of their commitment to pursue mutual understanding of each other's laws and legal systems ... There are plans to make the book available in the public domain as an introduction to the commonalities between the commercial laws of both countries....
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    Letter to the editor: Save home rule in New York

    The Post-Star 01 Dec 2020
    Editor. ... At the last minute, on Friday, Nov ... 16 until Dec. 7 ... Weak controls on noise, vibration and setbacks would become law. There are more threats, including references to projects within the Adirondack Park, eminent domain for some developers and the override of local laws deemed "unreasonably burdensome" by the office ... That has been swept away ... ....
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