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Conformal Transformations and Cosmological Perturbations in New General Relativity

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arxiv 2312.16021 v3 pith:3J5742ED submitted 2023-12-26 gr-qc astro-ph.COhep-th

Alexey Golovnev , A. N. Semenova , V.P. Vandeev This is my paper · ORCID
classification gr-qcastro-ph.COhep-th
keywords generalcaseconformalcosmologicalminkowskimodelsperturbationsrelativity
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We study conformal transformations in the most general parity-preserving models of the New General Relativity type. Then we apply them to analysis of cosmological perturbations in the (simplest) spatially flat cosmologies. Strong coupling issues around Minkowski spacetime are seen for many special cases of these models. At the same time, the behaviour of the most general three-parameter case seems to be very robust, presumably always with only the eight first-class constraints coming from diffeomorphisms. Also the case of the so-called 1-parameter New GR doesn't show any discontinuity between Minkowski and the cosmology, though without showing any deviations from GR which would be observable at this level either.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Cosmological Perturbation in New General Relativity: Propagating mode from the violation of local Lorentz invariance

    gr-qc 2025-09 conditional novelty 7.0 of 10

    In New General Relativity on a flat expanding universe, the propagating spectrum is computed for all nine types, with Type 3 carrying five stable tensor, scalar, and vector modes.

  2. Weak Gravity Limit in Newer General Relativity

    gr-qc 2024-12 conditional novelty 6.0 of 10

    In Newer GR, stable tensor and vector sectors force one coefficient combination to its GR value, and the STEGR-plus-gradient-squared model carries 3/2 new dynamical modes, not 1.

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