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  • Open Access

Conserved quantities in expanding Gödel cosmology

Alexander Leithes

  • Astronomy Unit, School of Physics and Astronomy, Queen Mary University of London, Mile End Road, London, E1 4NS, United Kingdom and The Roche School, 11 Frogmore, London, SW18 1HW, United Kingdom

Phys. Rev. D 113, 043502 – Published 5 February, 2026

DOI: https://doi.org/10.1103/bcdm-3nd7

Abstract

At linear order we study perturbations to a Gödel background spacetime which includes expansion in addition to rotation. We investigate the transformation behavior of these perturbations under gauge transformations and construct gauge-invariant quantities. Using the perturbed energy conservation equation we find that there are conserved quantities in expanding Gödel cosmology, in particular a spatial metric trace perturbation, ζSMTP, which is conserved on large scales for pressureless dust. We finally extend our discussion to a perfect fluid matter content to also obtain conserved quantities in this context.

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