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Cosmology in 5D and 4D Einstein-Gauss-Bonnet gravity

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arxiv 2207.09558 v4 pith:2EAKLMWQ submitted 2022-07-19 hep-th gr-qc

F. Gomez , S. Lepe , V.C. Orozco , P. Salgado This is my paper · ORCID
classification hep-thgr-qc
keywords gravityfive-dimensionalproceduresolutionssomecosmologicaleinstein-gauss-bonnetthen
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We consider the five-dimensional Einstein-Gauss-Bonnet gravity, which can be obtained by means of an apropriate choice of coeficients in the five-dimensional Lanczos-Lovelock gravity theory. The Einstein-Gauss-Bonnet field equations for the Friedmann-Lema\^itre-Robertson-Walker metric are found as well as some of their solutions. A four-dimensional gravity action is obtained from the Gauss-Bonnet gravity using the Randall-Sundrum compactification procedure and then it is studied the implications of the compactification procedure in the cosmological solutions. The same procedure is used to obtain gravity in four dimensions from the five-dimensional AdS-Chern-Simons gravity to then study some cosmological solutions. The same procedure is used to obtain gravity in 4D from the five-dimensional AdS-Chern-Simons gravity to then study some cosmological solutions. Some aspects of the construction of the four-dimensional action gravity are considered in an Appendix.

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  1. Degenerate and connection-dependent cosmological sectors in f(Q,C) gravity

    gr-qc 2026-07 conditional novelty 6.0 of 10

    Connection field equations force a degenerate f(R)-equivalent sector of f(Q,C) cosmology in which three geometric connections coincide, and only nonzero integration constants make the connections physically distinct.

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