Journal article Open Access

Cosmological experiments in superfluid helium?

Zurek, W. H.


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  <identifier identifierType="URL">https://zenodo.org/record/1233041</identifier>
  <creators>
    <creator>
      <creatorName>Zurek, W. H.</creatorName>
      <givenName>W. H.</givenName>
      <familyName>Zurek</familyName>
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  <titles>
    <title>Cosmological experiments in superfluid helium?</title>
  </titles>
  <publisher>Zenodo</publisher>
  <publicationYear>1985</publicationYear>
  <dates>
    <date dateType="Issued">1985-10-10</date>
  </dates>
  <resourceType resourceTypeGeneral="JournalArticle"/>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://zenodo.org/record/1233041</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1038/317505a0</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="https://creativecommons.org/publicdomain/zero/1.0/legalcode">Creative Commons Zero v1.0 Universal</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">Symmetry breaking phase transitions occurring in the early Universe are expected to leave behind long-lived topologically stable structures such as monopoles, strings or domain walls1–6. Here I discuss the analogy between cosmological strings and vortex lines in the superfluid, and suggest a cryogenic experiment which tests key elements of the cosmological scenario for string formation. In a superfluid obtained through a rapid pressure quench, the phase of the Bose condensate wavefunction—the 4He analogue of the broken symmetry of the field-theoretic vacuum—will be chosen randomly in domains of some characteristic size d. When the quench is performed in an annulus of circumference C the typical value of the phase mismatch around the loop will be ∼(C/d)1/2. The resulting phase gradient can foe sufficiently large to cause the superfluid to flow with a measurable (mm s−1), randomly directed velocity.</description>
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