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Date
2022-01-20Type
- Journal Article
Citations
Cited 8 times in
Web of Science
Cited 11 times in
Scopus
ETH Bibliography
yes
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Abstract
We discuss the most general field equations for cosmological spacetimes for theories of gravity based on non-linear extensions of the non-metricity scalar and the torsion scalar. Our approach is based on a systematic symmetry-reduction of the metric-affine geometry which underlies these theories. While for the simplest conceivable case the connection disappears from the field equations and one obtains the Friedmann equations of general relativity, we show that in Γα μ ν =0 cosmology the connection generically modifies the metric field equations and that some of the connection components become dynamical. We show that f(Q) cosmology contains the exact general relativity solutions and also exact solutions which go beyond. In f(Q) cosmology, however, the connection is completely fixed and not dynamical. Show more
Publication status
publishedExternal links
Journal / series
Classical and Quantum GravityVolume
Pages / Article No.
Publisher
IOP PublishingSubject
cosmology; extensions of general relativity; teleparallelismOrganisational unit
09662 - Heisenberg, Lavinia / Heisenberg, Lavinia
Funding
801781 - Modified Gravity on Trial (EC)
179740 - Multimessenger constraints of modified gravity (SNF)
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Show all metadata
Citations
Cited 8 times in
Web of Science
Cited 11 times in
Scopus
ETH Bibliography
yes
Altmetrics