Characteristics of the new phase in CDT

2017
journal article
article
dc.abstract.enThe approach of Causal Dynamical Triangulations (CDT), a candidate theory of nonperturbative quantum gravity in 4D, turns out to have a rich phase structure. We investigate the recently discovered bifurcation phase CbCbC_{b} and relate some of its characteristics to the presence of singular vertices of very high order. The transition lines separating this phase from the "time-collapsed" B-phase and the de Sitter phase CdSCdSC_{dS} are of great interest when searching for physical scaling limits. The work presented here sheds light on the mechanisms behind these transitions. First, we study how the B–CbCbC_{b} transition signal depends on the volume fixing implemented in the simulations, and find results compatible with the previously determined second-order character of the transition. The transition persists in a transfer matrix formulation, where the system’s time extension is taken to be minimal. Second, we relate the new CbCbC_{b}–CdSCdSC_{dS} transition to the appearance of singular vertices, which leads to a direct physical interpretation in terms of a breaking of the homogeneity and isotropy observed in the de Sitter phase when crossing from CdSCdSC_{dS} to the bifurcation phase CbCbC_{b}.pl
dc.affiliationWydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiegopl
dc.contributor.authorAmbjørn, J.pl
dc.contributor.authorGizbert-Studnicki, Jakub - 107255 pl
dc.contributor.authorGörlich, Andrzej - 135185 pl
dc.contributor.authorJurkiewicz, Jerzy - 128560 pl
dc.contributor.authorKlitgaard, N.pl
dc.contributor.authorLoll, R.pl
dc.date.accessioned2017-06-01T11:21:57Z
dc.date.available2017-06-01T11:21:57Z
dc.date.issued2017pl
dc.date.openaccess0
dc.description.accesstimew momencie opublikowania
dc.description.number3pl
dc.description.versionostateczna wersja wydawcy
dc.description.volume77pl
dc.identifier.articleid152pl
dc.identifier.doi10.1140/epjc/s10052-017-4710-3pl
dc.identifier.eissn1434-6052pl
dc.identifier.issn1434-6044pl
dc.identifier.projectROD UJ / Ppl
dc.identifier.urihttp://ruj.uj.edu.pl/xmlui/handle/item/41076
dc.languageengpl
dc.language.containerengpl
dc.rightsUdzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa*
dc.rights.licenceCC-BY
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/legalcode.pl*
dc.share.typeotwarte czasopismo
dc.subtypeArticlepl
dc.titleCharacteristics of the new phase in CDTpl
dc.title.journalThe European Physical Journal. C, Particles and Fieldspl
dc.typeJournalArticlepl
dspace.entity.typePublication
dc.abstract.enpl
The approach of Causal Dynamical Triangulations (CDT), a candidate theory of nonperturbative quantum gravity in 4D, turns out to have a rich phase structure. We investigate the recently discovered bifurcation phase CbCbC_{b} and relate some of its characteristics to the presence of singular vertices of very high order. The transition lines separating this phase from the "time-collapsed" B-phase and the de Sitter phase CdSCdSC_{dS} are of great interest when searching for physical scaling limits. The work presented here sheds light on the mechanisms behind these transitions. First, we study how the B–CbCbC_{b} transition signal depends on the volume fixing implemented in the simulations, and find results compatible with the previously determined second-order character of the transition. The transition persists in a transfer matrix formulation, where the system’s time extension is taken to be minimal. Second, we relate the new CbCbC_{b}–CdSCdSC_{dS} transition to the appearance of singular vertices, which leads to a direct physical interpretation in terms of a breaking of the homogeneity and isotropy observed in the de Sitter phase when crossing from CdSCdSC_{dS} to the bifurcation phase CbCbC_{b}.
dc.affiliationpl
Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego
dc.contributor.authorpl
Ambjørn, J.
dc.contributor.authorpl
Gizbert-Studnicki, Jakub - 107255
dc.contributor.authorpl
Görlich, Andrzej - 135185
dc.contributor.authorpl
Jurkiewicz, Jerzy - 128560
dc.contributor.authorpl
Klitgaard, N.
dc.contributor.authorpl
Loll, R.
dc.date.accessioned
2017-06-01T11:21:57Z
dc.date.available
2017-06-01T11:21:57Z
dc.date.issuedpl
2017
dc.date.openaccess
0
dc.description.accesstime
w momencie opublikowania
dc.description.numberpl
3
dc.description.version
ostateczna wersja wydawcy
dc.description.volumepl
77
dc.identifier.articleidpl
152
dc.identifier.doipl
10.1140/epjc/s10052-017-4710-3
dc.identifier.eissnpl
1434-6052
dc.identifier.issnpl
1434-6044
dc.identifier.projectpl
ROD UJ / P
dc.identifier.uri
http://ruj.uj.edu.pl/xmlui/handle/item/41076
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights*
Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa
dc.rights.licence
CC-BY
dc.rights.uri*
http://creativecommons.org/licenses/by/4.0/legalcode.pl
dc.share.type
otwarte czasopismo
dc.subtypepl
Article
dc.titlepl
Characteristics of the new phase in CDT
dc.title.journalpl
The European Physical Journal. C, Particles and Fields
dc.typepl
JournalArticle
dspace.entity.type
Publication
Affiliations

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