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Cosmic acceleration in Regge-Teitelboim gravity

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arxiv 2202.09453 v1 pith:SLR5NLFI submitted 2022-02-18 gr-qc hep-th

S. Fabi , A. Stern , Chuang Xu This is my paper · ORCID
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keywords accelerationcosmicembeddingsgravityregge-teitelboimsourcetermsattributable
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The Regge-Teitelboim formulation of gravity, which utilizes dynamical embeddings in a background space, effectively introduces source terms in the standard Einstein equations that are not attributable to the energy-momentum tensor. We show that for a simple class of embeddings of the Robertson-Walker metric, these source terms naturally generate cosmic acceleration.

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  1. Updated constraints on Regge-Teitelboim gravity

    astro-ph.CO 2025-06 conditional novelty 4.0 of 10

    Planck and low-redshift data constrain the Stern-Xu Regge-Teitelboim extra acceleration component to Ω_RT < 0.006 at 95% confidence, making the model observationally indistinguishable from ΛCDM.

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