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Signature change of the metric in CDT quantum gravity?


Signature change of the metric in CDT quantum gravity?

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dc.contributor.author Ambjørn, J. pl
dc.contributor.author Coumbe, Daniel N. pl
dc.contributor.author Gizbert-Studnicki, Jakub [SAP14011527] pl
dc.contributor.author Jurkiewicz, Jerzy [SAP11006413] pl
dc.date.accessioned 2015-11-19T14:54:55Z
dc.date.available 2015-11-19T14:54:55Z
dc.date.issued 2015 pl
dc.identifier.issn 1126-6708 pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/16950
dc.language eng pl
dc.rights Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa *
dc.rights.uri http://creativecommons.org/licenses/by/4.0/pl/legalcode *
dc.title Signature change of the metric in CDT quantum gravity? pl
dc.type JournalArticle pl
dc.abstract.en We study the effective transfer matrix within the semiclassical and bifurcation phases of CDT quantum gravity. We find that for sufficiently large lattice volumes the kinetic term of the effective transfer matrix has a different sign in each of the two phases. We argue that this sign change can be viewed as a Wick rotation of the metric. We discuss the likely microscopic mechanism responsible for the bifurcation phase transition, and propose an order parameter that can potentially be used to determine the precise location and order of the transition. Using the effective transfer matrix we approximately locate the position of the bifurcation transition in some region of coupling constant space, allowing us to present an updated version of the CDT phase diagram. pl
dc.subject.en models of quantum gravity pl
dc.subject.en lattice models of gravity pl
dc.description.volume 2015 pl
dc.description.number 8 pl
dc.description.publication 1,1 pl
dc.identifier.doi 10.1007/JHEP08(2015)033 pl
dc.identifier.eissn 1029-8479 pl
dc.title.journal The Journal of High Energy Physics pl
dc.language.container eng pl
dc.affiliation Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego pl
dc.subtype Article pl
dc.identifier.articleid 33 pl
dc.rights.original CC-BY; otwarte czasopismo; ostateczna wersja wydawcy; w momencie opublikowania; 0; pl
dc.identifier.project ROD UJ / P pl
.pointsMNiSW [2015 A]: 40

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Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa Except where otherwise noted, this item's license is described as Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa