Undergrad Do extra dimensions lead to expansion of our universe?

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The discussion centers on the implications of extra dimensions in gravitational theories, suggesting that their instability could lead to the expansion of our four-dimensional universe into higher-dimensional space. The original paper referenced is published in Physical Review D, confirming its credibility. Participants clarify misconceptions about the publication status of the work. The conversation highlights the significance of understanding extra dimensions in the context of cosmology. Overall, the potential for extra dimensions to influence the universe's expansion is a key takeaway.
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Quite an authority ! But it looks to me as if he didn't get this one published ?

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BvU said:
But it looks to me as if he didn't get this one published ?
It's clearly visible in the link that it's published, in Phys.Rev. D68 (2003) 026006.
 
Thanks ! o:) My bad...

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Thread 'Questioning the timescape model'

"Supernovae evidence for foundational change to cosmological models" https://arxiv.org/pdf/2412.15143 The paper claims: We compare the standard homogeneous cosmological model, i.e., spatially flat ΛCDM, and the timescape cosmology which invokes backreaction of inhomogeneities. Timescape, while statistically homogeneous and isotropic, departs from average Friedmann-Lemaître-Robertson-Walker evolution, and replaces dark energy by kinetic gravitational energy and its gradients, in explaining...
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