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Characteristics of the new phase in CDT
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.abstract.en | 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}. | pl |
dc.affiliation | Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego | pl |
dc.contributor.author | Ambjørn, J. | pl |
dc.contributor.author | Gizbert-Studnicki, Jakub - 107255 | pl |
dc.contributor.author | Görlich, Andrzej - 135185 | pl |
dc.contributor.author | Jurkiewicz, Jerzy - 128560 | pl |
dc.contributor.author | Klitgaard, N. | pl |
dc.contributor.author | Loll, R. | pl |
dc.date.accessioned | 2017-06-01T11:21:57Z | |
dc.date.available | 2017-06-01T11:21:57Z | |
dc.date.issued | 2017 | pl |
dc.date.openaccess | 0 | |
dc.description.accesstime | w momencie opublikowania | |
dc.description.number | 3 | pl |
dc.description.version | ostateczna wersja wydawcy | |
dc.description.volume | 77 | pl |
dc.identifier.articleid | 152 | pl |
dc.identifier.doi | 10.1140/epjc/s10052-017-4710-3 | pl |
dc.identifier.eissn | 1434-6052 | pl |
dc.identifier.issn | 1434-6044 | pl |
dc.identifier.project | ROD UJ / P | pl |
dc.identifier.uri | http://ruj.uj.edu.pl/xmlui/handle/item/41076 | |
dc.language | eng | pl |
dc.language.container | eng | pl |
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.subtype | Article | pl |
dc.title | Characteristics of the new phase in CDT | pl |
dc.title.journal | The European Physical Journal. C, Particles and Fields | pl |
dc.type | JournalArticle | pl |
dspace.entity.type | Publication |
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