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The Geometrical Trinity of Gravity
Stockholms universitet, Nordiska institutet för teoretisk fysik (Nordita). University of Tartu, Estonia.ORCID-id: 0000-0002-9403-8565
Rekke forfattare: 32019 (engelsk)Inngår i: Universe, ISSN 2218-1997, Vol. 5, nr 7, artikkel-id 173Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The geometrical nature of gravity emerges from the universality dictated by the equivalence principle. In the usual formulation of General Relativity, the geometrisation of the gravitational interaction is performed in terms of the spacetime curvature, which is now the standard interpretation of gravity. However, this is not the only possibility. In these notes, we discuss two alternative, though equivalent, formulations of General Relativity in flat spacetimes, in which gravity is fully ascribed either to torsion or to non-metricity, thus putting forward the existence of three seemingly unrelated representations of the same underlying theory. Based on these three alternative formulations of General Relativity, we then discuss some extensions.

sted, utgiver, år, opplag, sider
2019. Vol. 5, nr 7, artikkel-id 173
Emneord [en]
general relativity, modified gravity, torsion, non-metricity
HSV kategori
Identifikatorer
URN: urn:nbn:se:su:diva-171774DOI: 10.3390/universe5070173ISI: 000478769900006OAI: oai:DiVA.org:su-171774DiVA, id: diva2:1346338
Merknad

This article belongs to the Special Issue Selected Papers from José Plínio Baptista School on Cosmology “The dark sector of the universe”.

Tilgjengelig fra: 2019-08-27 Laget: 2019-08-27 Sist oppdatert: 2019-12-17bibliografisk kontrollert

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