Please use this identifier to cite or link to this item: https://physrep.ff.bg.ac.rs/handle/123456789/272
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dc.contributor.authorDimitrijević-Ćirić, Marijaen_US
dc.contributor.authorNikolić, B.en_US
dc.contributor.authorRadovanović, Vojaen_US
dc.date.accessioned2022-07-05T17:17:57Z-
dc.date.available2022-07-05T17:17:57Z-
dc.date.issued2017-04-01-
dc.identifier.issn0295-5075-
dc.identifier.urihttps://physrep.ff.bg.ac.rs/handle/123456789/272-
dc.description.abstractThe breaking of diffeomorphism invariance in the Moyal-Weyl (θ-constant) noncommutative (NC) space-time is a well-known and a long-standing problem. It makes the construction of NC gravity models and interpretation of their results very difficult. In order to solve this problem in this letter we construct a NC gravity action based on the NC SO(2, 3)∗ gauge group and the Seiberg-Witten expansion. The NC equations of motion show that the noncommutativity plays the role of a source for the curvature and/or torsion. Finally, we calculate the NC corrections to the Minkowski space-time and show that in the presence of noncommutativity the Minkowski space-time becomes curved, but remains torsion-free. More importantly, we show that the coordinate system we are using is given by the Fermi normal coordinates; the NC deformation is constant in this particular reference system. The breaking of diffeomorphism invariance is understood as a consequence of working in a preferred reference system. In an arbitrary reference system, the NC deformation is obtained by an appropriate coordinate transformation.en_US
dc.relation.ispartofEPLen_US
dc.titleNoncommutative gravity and the relevance of the θ-constant deformationen_US
dc.typeArticleen_US
dc.identifier.doi10.1209/0295-5075/118/21002-
dc.identifier.scopus2-s2.0-85022198154-
dc.identifier.urlhttps://api.elsevier.com/content/abstract/scopus_id/85022198154-
dc.relation.issue2en_US
dc.relation.volume118en_US
item.fulltextNo Fulltext-
item.grantfulltextnone-
item.openairetypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
crisitem.author.orcid0000-0001-7738-7141-
crisitem.author.orcid0000-0003-0675-1836-
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