Journeys Through Antigravity?

Abstract

A possibility of journeys through antigravity has recently been proposed, with the suggestion that Weyl-invariant extension of scalars coupled to Einstein gravity allows for an unambiguous classical evolution through cosmological singularities in anisotropic spacetimes. We compute the Weyl invariant curvature squared and find that it blows up for the proposed anisotropic solution both at the Big Crunch as well as at the Big Bang. Therefore the cosmological singularities are not resolved by uplifting Einstein theory to a Weyl invariant model.

13 pages, note, references and acknowledgements added to match JHEP journal version

References in corpus (3)

• Sailing through the big crunch-big bang transition
• Hidden Superconformal Symmetry of the Cosmological Evolution
• Traversing Cosmological Singularities, Complete Journeys Through Spacetime Including Antigravity

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